It wasn't on a Clyde ride, but it was an endurance event of sorts.

It was my graduation exercise for a Survival training course I had to go through before I went to work for DeBeers in Africa. It was live termite grubs, fresh out of the log. I was dropped 100 miles out in a wilderness area with 2 pairs of socks, a snare, a knife and a flint and steel, and a compass. I had to walk out. I had a locater to ping if I wanted pickup or got hurt, but a pickup was a washout.
Interestingly enough, they don't taste bad.