Just to find out the hard way "I shoulda just listened instead".

Mild example would be touching a bench or something that says "Wet Paint" just to see if it was?

Or go up to a dog with a "Beware of dog" sign(s) posted?

Mine was "Never touch an electric fence in the rain". I did. 15 minutes later I was able to talk and move again. For context, I'm older (53) and was used to the "early days" where you could hear the tick tick tick of the pulse running thru the hotwire. Came across one on a rainy day that I needed to get across, so I listened for a bit. Never heard the tick. I assumed it was off. Nope. Grabbed it, BZZZZT and 15 disappeared.