MrBeast's standing by his choice to trap a stuntman inside a burning building for a cash prize ... arguing the guy's a pro and firefighters were on standby ... so, it was all totally safe. Here's the ...

Add Yahoo as a preferred source to see more of our stories on Google. Mr. Beast/Youtube Mr. Beast and the stuntman featured in his video. The video follows a stuntman attempting to escape "death traps ...