Because making fun of the Glitter of Doom is highly amusing!
As for what the scenes actually say, since they're too small to be read...
W/ Bella: Is dat blood? Gosh dang!
W/ Jasper: COOKIES! Wait, no, blood! Crap strawberry scented, too...
W/ Robert: BROTHER, NOOOO! Save the Bella! And the whales!
W/ Rob and Jasper: Bleep, those are my cookies! Er, I mean, Bella! *uber shoves*
W/ Jasper: *crashes into piano* FLOWER! (insert expletives here)
Ah, the joys of inside jokes, and the fanfics, skits, youtube videos and musicals that provide them.