Maybe it’s just the human version of Confuse-A-Cat.
Like this! Fight 'em like a man. A naked man. Fighting babies.
It is my go to idea when a man is being obnoxious but some people don’t know their own strength and things might turn out bad, so I needed to cover my ass just in case of zombies or anything like that happening.
Cos it might. You know what zombies are like.
But punching him in the nuts does tend to be a cure-all.
I tried that.
The police were not sympathetic, and the courts have ordered me never to come within 500 feet of the playground again.
Worst part was, someone stole my clothes. 
Aw, my li’l baby thread! Back from the dead!
As for the topic, this video is probably the worst one I’ve seen: We scare babies for fun....and WE LOVE IT =] part 2. - YouTube
It shows two or three people ganging up on this toddler to scare the daylights out of her with a pop-up clown, as far as I can tell. IIRC, this is the video that inspired me to start this thread.