I'm no expert but it sounds like a bad leg entrapment and he's lucky to be alive.
There is a huge difference between the customer accepting risk and guide being negligent... Pinecricker New
If its a "normal, safe practice", how did the passenger end up with a busted leg? <NT> Pinecricker New
You just said "there are factors that are outside a guide's control". I wasn't there so ought not speculate... possum New