Read the comic here.
Whiskey is remembering the question he asked all the way back in Episode 77. Originally I was going to make a joke about "never vacuuming", with a comeback from Donut about "the explosive decompression at the end of Chapter One not good enough?" but I couldn't get the timing to work right. Plus the link between "vacuum" and "explosive decompression" was weak at best.
I'm looking forward to the reveal tomorrow of where the Brick House ended up. Aren't you?