It didn't take long because when we stood up to line up for gym, we noticed the hood swayed like there was a breeze, but the windows were all closed. Coco Monkey and I made sure we were in line in front of him.
We were able to avoid the worst of the smell by the warnings his hood sent us. I got in trouble by laughing at it so much. I did avoid getting sent out into the hall, but just barely. I hope we have backwards day again so we can be ahead of Little Ape's gas attacks.