New York City-based comedy collective Improv Everywhere is known for pulling positive pranks that bring a smile to people's faces. Here, they pull a hilarious time travel prank on a subway car full of unsuspecting commuters by using four sets of identical twins.
The video shows a man entering the subway and asking the whole car for donations to build his time machine. Moments later, his future self comes in and warns him not to build the time machine due to dire unforeseen consequences in the future. As the car rolls along, more travelers get on board to convince the man to abandon his project. By the time it's all over, there are four sets of identical twins in the car, much to the amusement and confusion of their fellow passengers.
H/T: Improv Everywhere