-Mikey and Brand open the door for Mouth.
-A few seconds later, Mouth, Mikey, and Brand hear Chunk downstairs in the yard.
-Mouth makes Chunk do the truffle-shuffle, and then they go through this whole big thing with the bowling ball, balloon, chicken, etc.
-If Chunk had to go through all that mess, then how did Mouth get through the gate without Mikey or Brand setting it off?