I probably give away more inner tubes to fellow cyclists than i use myself, some of the memorable ones are…
+ Ard Rock, came across a bloke pushing towards the last stage, he’d been running tubeless and used the 2 spares he’d brought. Gave him a tube so he could do the last stage. Saw him later and he kindly bought me a pint.
+ On the canal near Elland a bloke commuting had a flat so I gave him a tube and another lad in our group change it over for him.
+ Gisburn at the bottom of Hully Gully I came across a chap with a flat and no spare, gave him a tube so he could finish his ride, he was probably at the farthest point from his car when he got the puncture.
+ Not an inner tube donation but about 8 years ago I was travelling with the missus on the great ocean road and was flagged down by a cyclist, he was on a 5 day cycling trip to meet his wife and kids but had fallen behind schedule and it would be getting dark well before he reached his destination and with no phone signal he was unable to contact his family so was concerned they would worry about him. We loaded his bike in the camper van and dropped him off at the family holiday home where we had tea and cake and the offer of a bed for the night, unfortunately we had a pretty tight schedule but it was a nice gesture.