A stickman stares in disbelief and says "Fuck dat shit fyfw." That last word is prolly wrong, but it's kind of a scribble.

Portal, probably. Somehow there's two orange portals, with one on the floor and one on the side of the column where the player is standing.

A very colorful explosion, punctuated by a "BOOM" in the center.

Homer cuts a red flower with a grey triangle.