they wrap the tennis ball material around liquid oxygen and then put it in the oven.
― ken c (ken c), Tuesday, 20 February 2007 17:50 (seventeen years ago) link
although that would also kill the mini daleks
― DavidM (DavidM), Tuesday, 20 February 2007 17:51 (seventeen years ago) link
― Ronan (Ronan), Tuesday, 20 February 2007 17:58 (seventeen years ago) link