My Dad went to Cambridge and when I told him what had happened on Sunday he told me about a friend of his who fell in after punting and was asked to do it again by a man on a bridge who wanted to catch it on his cine camera!

He was given a pound for his troubles. This was in the early 60's so I'm not sure what that would be today, but I'd imagine it's approx. £15, so, to a student it's probably worth it.