Yet, by some miracle, 99.9% manage to go there and leave without commiting some degree of assault.
Whoever the clowns jumping out and trying to keep the mob away from him (and, unfortunately, succeeding) when he was down should've joined him on the ground. If you don't send a clear and direct message at every opportunity you lose the advantage (in this case being the "advantage" of having compliant patrons not out to cause such occurrences).