Ruben almost destroys Mark's relationship

Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!

Ruben arranges for Mark's girlfriend to stand outside the shed with a bunch of balloons, and tell him that she is pregnant. Ruben then claims to be the father of the child, and sets off a party popper. Mark rates the surprise at 9/10, and Lasse puts it in first place.

(Written by Karl Craven)