A quick reminder that they were all definitely going to work alongside this Titan boy that they feared was given, so they'd better control themselves.  They needed him, because he was an actual edge they had in battle, someone who had effectively turned disaster into potential recovery.  That he wore the guise of the monsters they fought was irrelevent to the point, because what they needed and what they [i]had[/i] was someone who could fight on their level, someone who would NEVER turn on the human race, since he hated the Titans with an unrivaled passion.  If [i]anyone[/i] in the entire Survey Corp or anyone else in service against the Titans was more singularly-fixated than Eren Jaeger, they had yet to make themselves known.  The Elites would of course stand down, some of them actually looking a bit ashamed and apologetic.

But with that all said and done, it was time for a bit of show-and-tell.  Hange would lead them to another part of the castle area, where they would find a fairly-open area...with Titans.  Naturally, Eren expressed immdiate confusion, even apprehension, asking [color=8dc73f]"What're [i]they[/i] doing here?"[/color], to which Hange explained [color=a0410d]"They're test subjects."[/color] before turning and addressing them as though the two voracious killers were children.  One was blonde and in a sitting position, 4 meters tall and with a vacant happy expression that DID seem almost like a child.  The other was 7 meters, brown haired, and almost seemed like it was laughing as it lay there, trying to snap off Hange's legs when she approached it.  They were tied down, of course.  Tied down, nailed and generally experimented on to learn more about their kind.  It was from studying Titans like these that she learned all that they know about the strengths and weaknesses of their enemy, more-so than what is learned in the field.  She refered to them as Sawney (the blonde) and Beane (the brunette).

About this time, you'd probably realize that Kate had split from the group before they even arrived here, and as Hange was explaining her tests upon the Titans' recovery abilities along with their need for the sun and their [i]lack[/i] of the food necessity despite their so-called appetites, she would then return...driving in a familiar cart.  This was the one she'd been riding in, keeping an eye on its contents.  At the moment, it did not contain any of the gunpowder that had been brought with them.  Hange brought attention to this as she said [color=a0410d]"And now, I think we're ready for the demonstration.  This is something that Kate and I have been working on."[/color].  The tarp covering it all was thrown back, and young inventor held up...an unusual device.  It seemed somewhat tubular, and appeared to have some sort of a trigger.  Those who were aware of the harpoon launchers used to secure down Titans of course recognized this as something like that, but single-barreled instead of seven, and therefore light enough to be carried by one person.  Hange was outlining the thing because she was simply a better talker, while Kate already knew how best to operate the device.

[color=a0410d]"The more experienced will note how similar it is to our harpoon launchers for use with Titan-capture wires.  However, the purpose of this device is far more dangerous."[/color]

The other things in this wagon were a set of harpoons, but not the classic ones.  They were purpose-built things, with a spearhead that was not flat, but was more like a Philips-head screwdriver.  Following that was something like an inserted sphere with a kind of tab on the top of it, and the rest of metal shaft to be inserted into the launcher itself, which Katherine now did.

[color=a0410d]"Because the size of many Titans have made most firearms useless, except in groups, we have no effective long-range weapon against the Titans other than cannonshot.  This is about to change.  Everyone get out of the way!"[/color]

This sudden shout was full of such excitement that some of them would surely jump, and then Kate leveled the device squarely at Sawney's stomach.  There was the [i]loud[/i] report of a harpoon launcher firing as Kate braced herself and fired it, sending the spear device into the Titan's stomach, followed by a muffled but still potent [b][i][color=ed1c24]POW![/color][/i][/b] as the stomach blew open!  Sawney reacted with...maybe a [i]little[/i] distress?  Or maybe that was Hange's imagination as she went up to him, apologizing profusely and examining his gorge-leaking stomach.  Everyone downwind, meanwhile, would have to hold their noses.  That was [i]rank![/i]  Hange turned towards the others, unaffected by this and with a devious smile on her face.

[color=a0410d]"Imagine that happening at the nape of the Titan's neck.  The spear cuts open the skin to allow a black powder bomb, which has been ignited by the release tab immediately at launch, to pass right into the flesh and blast it from the inside!  With the nape of the neck destroyed, the Titan dissolves soon after, and the one using the launcher can simply move on to the next target."[/color]

This was a new level of engagement.  The device looked a bit bulky, and naturally it would take some getting use to in order to fire these things properly, but think of the level of ease there is in being able to plant yourself on a roof or even on the ground a safe disance from a Titan, shooting this thing, watching it fall dead, and then going for another exploding spear?  This is what Kate had been working on after the Titan-Shredder.  She [i]and[/i] Hange, apparently, though that only made sense.  How could she possibly be able to design something for a launcher device without being able to see the existing ones and its specs?  Maybe through careful calculation?  Ah, but that would be from scratch.  No, thanks to her aunt, the work was done [i]much faster[/i]...