The definitive OTP ( Off-The-Peg ) List (<£500 and <£1,000 sections)

Scrotal friction braking yes, but I was referring to scrotal air resistance braking, much like the pictured tree squirrel, but using a stretched ballsack.

The trick that a single mother who makes $4000 a month on the internet told me is to use embro cream to stretch the skin. Careful not to flame it up to much or you'll stretch past optimum scrotal skin integrity. It must still be a bit springy upon clenching.