Something similar happened to me. When I was walking home from high school I found a quarter on the ground. I was craving potato salad so I went to a deli and asked them for a quarter’s worth of it (they sold by weight). The guy at the counter looked really pensive and then was like “you know what, take it for free”. He definitely thought I was a homeless teenager. I lived a block away and had for over a decade, and I went there all the time. Super awkward.