Years ago, Kevin Keegan was mugged after pulling into a motorway lay-by for a kip (as you do, of course...)
Quite why two baseball bat-wielding thugs were hanging around this particular lay-by on the off-chance that someone might pull in for a brief nap has never been quite explained. And the lay-by in question seemed to have a bit of a ....'reputation', shall we say.
Chuck any combination of 'Keegan', 'Reigate', 'M25', 'mugging' or 'rent boy pick-up zone' into google for alternative theories about what else could have been going on there.