Trust falls are an art, not a science. But, you know, for those who insist on science, here are some Trust Falls Pre-Requisites to get you started.
For the actual trust falls, you'll wantประก/trust-falls/Techniques/Trust-Falls-Techniques-For-Experts>Trust Falls Techniques like the classic "Swoop-n-Swivel" or the "Flip-n-Fly-by-The-Wind."
And remember, safety first! Check out these Trust Falls Safety Precautions before you start practicing your trust falls.