Not big zaps, but after a few ales during my EFT at Leeming in '78 we decided to brighten up the Red's Gnats with discreet 'Fly Navy' stickers beneath the cockpit hoods.
So discreet that the crabs almost missed them before displaying for the queen mum's visit.
Lot's of chuntering about possible peeling off and ingestion. Grumpy buggers took 'em off.
When we returned from Topcliffe that evening we were outside the squadron building as they taxied out. Cheery waves exchanged, until the tail end gnat turned tail-on to us. Red smoke on - GO.
He must have laughed all the way back to Kemble at the thought of us fishheads stood there drenched in red deisel.
Top marks!