I think Gaseous has it spot on. Seen it myself actually but lucky enough to have enough height to get out of it. Minimum time CPL sitting next to me as P1. I was along for the ride and duals were in. Approaching confined area for practice and P1 didn't realise we were actually coming in downwind! I left it late as I could risk without putting us at too much risk hoping he'd notice. Took control with those immortal words 'I have....'
If you put 2 average size guys (12.5st+ or 168lbs+ x 2 =350lbs+ )in an R22 with fuel, you've got nothing really in reserve power wise.
I know of instructors flying R22's who have to be at least 17st. Not only are they flying illegally but with another average guy onboard, they can't really fly anywhere without less than 5gals onboard. Wish I could do something about it! Too many people getting hurt in R22's and too many crashing.