Another surprise that can ruin a smoke sesh for someone is ash on their clothing.
Some people forget to ash before passing. If one fourth or more of the joint is ash, it’s beyond the time to let some go.
Don’t pass it along to the next person before ashing because it might fall directly on them.
If you don’t want to kill the smoke sesh, make sure you ash before you pass a joint that looks like it has Marge Simpson’s hairdo.