Spotted...

I was going pretty slow getting ready to stop and he came from behind me, pulled up along side me and grabbed a handfull of my right arse cheek, squezzed and gave a harty "Whey-hey!!" I could tell he thought he'd been a bit of a funny guy until the recognition that I wasn't Dave from Accounts.

he might have been one of the 'bum of the week' adjudicators.