Ride in valiantly on my warreindeer, and flip everyone off. Trample the bear.
You jump down riding your mount. (9+1) You jump down and the reindeer takes (4) damage, but its fine to charge/trample. You turn your mount next to weston, give him the finger, and charge the bear you can just barely see. The bear gets an oppertunity attack on the reindeer, and hits with his mighty claw! He deals (13) damage! You trample the bear! It dodges out of your way. You flip it off as it ducks under the hooves of your mighty steed, but it gets pointed at Archuther. Either way, it works for you.
Karl begins his turn! Still mounted, he gallops towards the sounds of the screaming. He finds the crossroads and sees Aurel as he rides past him. You go and see what the roaring was and see a bend before your horse stops moving to catch its breath for a moment. You look for any signs of the "screamer" as you rush by (4+4) but fail to find anything at all. ((You are now ~16 squares away from the bear's cave now (moved 24)))
Grot begins his turn! He lashes the reigns and has the cart start moving at a speed a little slower then Karl but faster then Aurel. Grot also passes by and waves at the non-human and stops a bit so he doesn't kill the horses with a fast moving cart going down hill. (moved 22 spaces)
The bear begins his turn! He ignores the eladrin on a reindeer and attacks Archuther! He has reach 2 ((which I COMPLETELY forgot about)). Lord Archuther activates an interrupt and everyone hears a weird noise coming from him. The bear hits him! It deals (19) damage and swings with its other claw! He misses the second time!
Symon begins his turn! ((crap, gotta see how far you are from the cave again...))
EDIT:
((Symon is currently, if my memory is right, almost at the bear, ~14 squares (unless i read my post wrong)))