You voted for the underwear Ldnpieboy should be wearing when he faces this challenge... he didn't get enough questions right, so as well as having 8 pies smashed in his face (this is why he's not totally clean at the start) he got the gunge box poured over him!

Holding 40x litres of Natrosol in 4 different colours you see the whole box emptied over his head whilst sitting in the pool in just his "winning" underwear

Hold on until the end for a slo-mo replay of the gunging!