Not sure I should tell this, but--
About 4 years ago when I was still young (76) a young fellow ran into the back of my truck at Walmart.
No damage to my truck but messed up the front of his car.
He proceeded to say it was my fault using some choice words, so I asked him to not use those words.
He then said he was going to beat me up and when he came at me I hit him one time and he went down.
The police came and asked if he wanted to press charges against me for knocking him down.
He said, with a smile on his face, no was was he going to admit an old man beat him up.
My wife said "I've been telling you you were getting old, now do you believe me?"
THAT is when it hit me!