Mike Boon (1940-2014) was a truly legendary caver whose many outstanding achievements included being a pioneer in the use of aqualungs for cave diving which allowed him to pass Sumps 6 and 7 in Swildon's Hole; explorations at the far end of Mossdale Caverns with Pete Livesy; exploring major river caves in Mexico, Guatemala, and Jamaica; and a solo exploration to the far end of Castleguard Cave in Canada which he pushed to a glacial ice plug.

In this interview, which has been extracted from Sid Perou's cave diving film The Devil is a Gentleman, available on this site, Mike discusses the first uses of aqualungs in cave diving, and goes on to describe the experience of getting stuck and losing his mouthpiece whilst passing Swildon's 7 for the first time. The film dramatised some of the important episodes in Mike's early diving career, hence the sound effects.