But if you dig a pit deep enough to put the air bag or mattress in then it doesn’t reduce the height of the pile. Also is the highest the height of the pile or the height on the “jump”?
When I was in High School we visited a mall that had an ice rink on a school trip. One of my classmates fell and almost had his fingers run over by another.
Mens room or cats room…it’s in the eye of the beholder.