My friend was helpin me take my 2 1/4 petrol out when doing the 200tdi conversion - we had it on the hoist and i was under knocking it apart from the transfer box - he was at the front tugging.
Engine suddenly went, swung forward on hoist and sliced off a massive part of his palm (it was trapped between the front pully on the engine adn the front of the chassis.
The short loud scream followed by silence made me realise it was very bad so was quickly out from under the landy, bandaged him up and off to A&E for lots and lots of stiches!