I first met Mike in 1965 at a summer party in Cambridge given by my brother Andy Darlington. We were in the first-floor kitchen of Andy's flat - I had been roped in to help with preparation of some tasty snacks. Mike and Ju arrived, introductions were made. The whole house and garden was filling up with guests - mostly recent graduates in various branches of science. Mike went straight to the window, pushed up the sash, peering out for a moment before leaping out into the garden and landing like a frog on the ground, legs akimbo and hands on the ground. He came to no harm, fortunately, but it was some time before we onlookers regained our composure!