Joe dodges the water bombs with ease before entering stage one.
Joe sees marshmallow cannons and thinks nothing of them...until he realizes that the marshmallows are melting due to being fired out of the cannons. He dodges like crazy but still gets a few stray globs of marshmallow on him. He enters stage two.
Joe sees a ton of false exits. He face-faults behind his mask and fishes through his pockets and pulls out a small rubber ball. He kicks the rubber ball through each exit until he finds the one that the ball doesn't come back through. He enters into stage three.
Joe immediately realizes that there are ping pong balls in buckets atop the doors. He shrugs off the prank and ping pong balls bounce harmlessly off him. He is grateful whoever set this up doesn't invest in slime and feathers...
Joe enters stage four and finds an non-rigged room. Shrugging, he walks through into stage 5.
Joe finds twelve balloons and pulls out the knife hidden in his jesters staff. He uses the knife to pop all the balloons (just in case there are fake keys).
He uses the key to open the door.
Joe sees the cake and realizes it's a fake. He moves on to vote for ACME because, "there are more of them than there are of us.".
i'm at a conference and just tweeted "there's an elsevier rep in the room. KILL HIM! KILL HIM! HE DOES THE WORK OF SATAN" and couldn't quite place what i was referencing... then i realized it was glados saying "BIRD! BIRD! KILL IT! IT'S EVIL"))