Still feel horrible for kicking my childhood dog out of the way
We had her since I was about 7... my last interaction with her was me kicking her out of the way (not hurting her though) because she was on the stairs blocking me and I was carrying luggage to my car. I was in a hurry to get to the airport. A few months later she died a slow painful death of liver failure while I was away at college. This memory has stuck with me for a long time. I wish I had just taken a few seconds to pet her and say goodbye.