Being slapped at the dinner table when I screamed because a wasp had stung me on the leg. Mum slapped me because she thought my & my brother were kicking each other under the table, and I was the nearest to her.
It served her right half an hour later when my leg swelled up, my lips went blue & I started gasping for breath - I was allergic to wasp stings so it turned out. God, that made her feel guilty. Good. I played on that guilt and got lots of chocolate once I came out of hospital ;-)