Oh yeah. I pulled into a gas station on my W650 one night and thought I had the side stand locked into position. As I started to get off the bike it started to go over. Lucky for me the bike is light and I was able to catch it in time before it hit the ground.
My friend pulled up with me one day and his side stand wasn't all the way down when he got off and his bike fell over.
I try to remind myself to always check the side stand and make sure it is locked down before I get off.
Sometimes we all have a brain that is somewhere else.