This is a hidden camera alien abduction prank orchestrated by the Programa Silvio Santos in Brazil. Basically they trap a twosome in a taxi (in the video they do it to two separate pairs), then the car breaks down in the woods, the driver gets out, disappears in a UFO's tractor beam, then aliens emerge from the UFO and come to the car to scare the shit out of the passengers. It all worked very well. Of course they never actually show the part where they tell the folks it was just a prank, so I'm pretty sure this is actually found footage of a real alien abduction, or those people all had heart attacks and/or other permanent life-altering trauma. Either way, great watch!
Keep going for the video (as well as another one of the first time they tried the prank I found while browsing Youtube), then let's absolutely not try the same thing here because people with guns.
Thanks to Zootghost, who's constantly pulling ghost pranks on people which aren't actually pranks because he really is a ghost.