65Kts in a Chinook coming back from the Brent. Went to Sumburgh instead...
Don't recall the outbound speed, wind had picked up en route.
Once saw a Fiesler Storch (almost an honourary helicopter) appear tail-first over a hangar at about 100' and fly across the apron backwards at walking pace. Mind you, he wasn't trying to go forwards! It did look odd when he put the power on though.