Yes, we live about 2 nm away as well, and from the upstairs windows could just see the anti-collision light of a helicopter hovering over the stadium. Initially I thought it was a security one, then the bit came up in the programme with the jump.
In the 1988 Seoul Olympic opening there was, of course, a spectacular skydive from altitude right into the stadium, where the jumpers (two Chinooks' full) formed the Olympic rings on the way down. I seem to recall it involved about 40-50 of them.