You had absolutely no obligation to help him at all.
Any choice you made would be entirely based on your own choice. How he (as opposed to other clampers) has previously behaved in relation to you and your friends is entirely relevant to that decision.
I don't think I would have helped him either in the circumstances you describe. (I use the same argument with parking attendants - you piss me about (again today - one tyre 2" over a line = ticket) and if I see you getting your head kicked in I really am not going to get involved. They don't seem to understand the connection)
(I know people use the same argument re- the police and how they behave and I have every sympathy with it - subject only to the fact I treat each INDIVIDUAL as I find and do not visit the sins of one on all the others)
Any choice you made would be entirely based on your own choice. How he (as opposed to other clampers) has previously behaved in relation to you and your friends is entirely relevant to that decision.
I don't think I would have helped him either in the circumstances you describe. (I use the same argument with parking attendants - you piss me about (again today - one tyre 2" over a line = ticket) and if I see you getting your head kicked in I really am not going to get involved. They don't seem to understand the connection)
(I know people use the same argument re- the police and how they behave and I have every sympathy with it - subject only to the fact I treat each INDIVIDUAL as I find and do not visit the sins of one on all the others)