[quote=@Jinxxed]
Hey this might seem a bit random but this is my first online rp... How do we handle.any dialogue or potential quickly paced scenes? To what grade are we allowed to write for other characters and are we even supposed to? 
[/quote]
I think [@Zman] said it best. Another option is to talk to the other person and work together on how things play out so you can collaborate on the same post. I would count that as both people having taken their turns to post though.