As of right now, my record is about 23 feet, and thats not from an elevated surface, just flat. From a cliff, Ive never measured, but I would eyeball it some 35 feet from a 10-15 foot height.
So, if it was weird reading that, dont flame me, just leave. Sorry you had to see that.
And if your intrigued, ask me about my technique. The circumsized need not apply.