The scene is a loud and confusing mess, with children and workers running amuck.
The mecha is destroyed and all the people running amuck become their usual selves again.
Whenever a dimension runs amuck, he will appear to annihilate all the evil with his power of fire.
They do not run amuck.
That would be the best and only guarantee against any nation going berserk, running amuck and starting another world war.
When chaos and human nature ran amuck, the fat controller sorted everything out.
The only exception is amok (or amuck) - an adjective or adverb.