Even Fred had to leg it once or twoce though. Remember that chimney that went slightly before he expected it to? He was burning the wooden supports he had put in and I think it collapsed faster than planned. The camera drama initially left you wondering if he would make it!Fred dibnah wasn't dodgy, he had a excellent understanding of the physics of what he did, safe as houses.... he wouldn't have got away with it for more than 40 years if he didn't...
he mentioned the 'jackhammer and run' types several times on his videos... and he thought they where crazy!