He lay there for half a second.  Perhaps half a second too long.  Ahhhh...  Oh that stinged.

"Fuck this."

Archer pushes against the platform with his spring loaded feet.  The springs are out, but the pressure still allows them to push him forward with more efficiency.  He leaps up with his back in the corner, and loads his boot again.  He leaps forward, his arc almost flat with the ground.  The board breaks under him as he leaps, and the platform begins to shudder.  Suddenly all the holes in the thin, lazy particle board crack open even further, and it all collapses in on itself.  As he flies through the air, yet still low to the ground, he allows the spring on his other foot to catch the giant's leg.  Combined with the platform tilting down in front of him...

He should fall face first into the corner of the arena.  But the knowing how tough his skin was to crack it would probably hurt the ground more than it hurt him.

As Jack slid up the slop of the board, he loaded his boot again.  He released it almost immediately, and brought his knee into the base of the giant's skull.