Originally Posted by Voiceless
Yes, there was a thread about that recently. The guillotine is not just a choke, but also a neck crank. I've never understood how people who have their neck stuck in a cranking hold would try to slam their way out and thereby expose their neck to extensive uncontrollable force. I mean, if you break your arm it will most likely be ok again in a month or two so you can try risky manoeuvers to avoid the tap, but everyone should know that if you break your neck it's pretty likely death or wheelchair for the rest of your life.
Well in sparring/rolling/training it would be a foolish thing to do. Would I attempt it if I was seconds from going unconscious against a guy in a street fight? Almost certainly. There comes a time when you're in a guys closed guard and the guy has got you dead to rights and you really don't want to participate in a game of hide the spice bottle (i love bas). In those situations I can see why people do it. With fighters it might be that willingness to risk it to win for whatever reason and in a fight you don't always see things clearly, you see an out and you take it.
Other times it can't be helped. You're shooting in or you're tied up and the guy goes for it when you're in motion to take it to the floor.