I don't actually know how many times i have done this. That feeling you get when you leave that you have forgotten something but you just cant remember what. This happened the other day i had left my phone charging and I left for school after being told my cousin was coming and he didn't have the keys so he would call me to know where i had hidden the spares, but of course with my memory I forgot! I was nearly at my bus stop, I could see the bus at the end of the roads and I noticed what i had forgotten i ran back home got my phone and missed my bus Well Done to me.:)