Double barrel shart barf

When you tape a willing participant by the neck to the wall in the "wall sit" position so their face is ass height. Then you proceed to also duct tape there mouth completely shut. Next up participant #2 (must be male or the finer points are lost) steps up and sharts in their face.. causing:
Vomit
To stream
From
Both
Nostrils
And thus striking and tickling the guys balls just right while he jerks it.