On the back of the negative thread of 'nasty to you'
Standing at the toilets at a station, bursting, no coins on me, about put a £20 note in the change machine that would had given me £19.70 all in coins. Nice random bloke pays the 30p for me to use the loo...
Student, broke, knackered, walking home up a big hill after a shift in late night takeaway 3 am, Cabbie stops, insists on giving me a free ride home the last mile and waits til I'm safely in door.