I remember spectating at the '77 or '78 British GP at Silverstone and seeing Tom Herron coming down Hanger Straight frantically slapping his chest. He was leading at the time and I think it was the 350cc race, in fact he was well ahead of everyone else. It looked to me as if a bee or wasp had got into his leathers and maybe was stinging him. He dropped back after that and I think Mang came through to win, mind you my memory is getting a bit hazy and it could have been Ballington and it could have been the 250cc race and it could have been '77 or '78.
I've always wondered what happened.
Was anyone else there and remember this and know why Tom was doing this?