Crack Up

comical
You need to check out the Harlem Shake. The video is a comical take on different dance trends and starts with one person dancing, later joined by a group of people doing ‘funny’ moves.

crack up
Watch Jimmy Fallon and Bryan Cranston crack up while playing a game called "Word Sneak," in which they have to sneak incongruous words casually into a conversation.

express
As profoundly social beings, chimpanzees need relationships. Just like humans, they cry, whimper, laugh, and hoot to express their emotions and feelings.

Harry decides to tease Charlie with his finger. He is left crying 'ouch' as his brother happily bites, oblivious to the pain he is causing. "That hurt Charlie" -- Harry tells off his brother who giggles at the camera.

maniacal
The Punan people believe that a large helmeted hornbill guards the river between life and death. Their call is described as hoots followed by maniacal laughter.