Thank you SLF - I think I had one of your neighbours after you.
Had my hand grabbed by a drunk, traumatised pax, who whispered 'do you think it's safe'. Then he proceeded to close his eyes and with a vice like grip trapped my hand between his paw and the seat arm, then proceeded to mutter prayers until, fortunately, he did subside into slumber after about 10 mins.
One of the few occasions I have made a dash for the exit as the seatbelt signs are switched off.