According to the uploader of this laundromat security footage, the Mensa rejects in the video sought to scare their toddler by putting him inside one of the washing machines. It worked: Once the door was shut, the machine's auto-lock system kicked in, and the child began to tumble helplessly inside.
The parents scrambled for assistance, but the ordeal lasted a very long minute before the child was finally rescued. Again, per the description, the child sustained minor injuries but is otherwise safe. (Except, you know, for the part where he is in the care of two adults who thought it would be a good idea to put him inside a washing machine.)