Iain's anticlimactic volcano

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

Iain made a volcano by burying a pipe in a pile of earth and stones, pouring 2 whole bottles of cola into the pipe, and dropping a net filled with Mentos into the pipe. He had put figures of the first 5 champions of Taskmaster (Josh Widdicombe, Katherine Ryan, Rob Beckett, Noel Fielding & Bob Mortimer) on the volcano, announcing he'd hope to join them as Champions. However, since he had already let most of the gas out of the coke, and had not created a bottleneck in his volcano to increase pressure, his eruption was extremely disappointing.

(Written by Taskmaster Wiki contributors)