[ QUOTE ]
All,
Today a friend ordered pizza, gave him a tip of a few dollars where one of the dollar bills was a $10 by accident. The pizza guy came back and knocked on the door, told him he accidentally gave him $10 extra. I don't know if he had him keep the $10 or gave him a $5 or what.
[/ QUOTE ]
switch the one with a ten and a 100 for the ten and i ve been on the receiving end of this in a bar i worked at, but they were good regulars so i gave it back next time they came in, if they had been shitt y tippers probably not.
had a guy pull out about 600 in 20's, 50's to pay a $150 bill tip me nicely and leave the rest on the counter, chased him out to give it back and he tipped ten bucks a drink for like two months after that.
Super rich nice guy has lunch the other day in the wine shop i work at 57.99 was the total, as he is ordering cases of nuits st georges, tante berthe etc he hands me a twenty and says keep the change? i looked puzzled and before i say anything he see's it a twenty not a 100 and hands me 4 more twenties, i have gotten a fair amount of similar tips, so dont be afraid you are tipping too much it nevers hurts to be sure

second most everything shaniac has said 20% is a min for decent service for me(and no service person i know would be unhappy with 20 % either) and good service always gets more. want my last check to bounce too.
another favorite was the "do you sell smokes here?" me "no sir" him "damn i 'll give you twenty bucks for a pack of X five minutes later "all i got are fifties thanks for the favor keep it"