Cabin
I have witnessed two over booking fracas one in Italy and one in Nigeria. In Italy a bunch of business types had suffered a long delay to their flight to Rome, which was then extended and they stormed an adjacent gate gate and stood and sat around the nose wheel of another DC9 demanding to be flown to Rome on that A/C. This was pre 9/11. After much arm waving and gesturing they were told to move or else action would be taken, they did not and the fire brigade were called, and these passengers were then given final option before hoses would be turned on. They did not move and got drenched.
In Nigeria it was far simpler, it was internal flight on 737 and flight was over booked apparently (I was on adjacent plane and gate) and all the passenger were made to run around the A/C with winners getting seats ! Some old dears looked as though they were going to have a heart attack.