A good friends son has just been deployed to a scary place. He is military intelligence. He requested food, and basic sundries. They are in a location where 2 meals a day is the norm. Just tough to get stuff in. They announce it at knitting in case anyone would like to add a something for him and his unit to their shopping list. Anyway. Then a woman who just happened to be having lunch there stopped at the table and gave my friend a stack of bills and said for your son. Then dashed away.
A truly random act of kindness. Such a nice thing to do.