<human>: I ask this because I recently god my paediatric first aid certificate, which technically doesn't cover adults, but effectively is the same thing. Well coming out of the 2 days course I felt really confident in my ability to assist someone on a sort of first point of contact level. 

However, a few weeks later, I had my headphones on but I turned around and saw a man laying on the middle of the supermarket, and people surrounding him. Out of respect I didn't gawk and figured he was getting help. It wasn't until I walked away I got this sickening thought "F*** I am trained to help that guy and I completely forgot I had to ability to do so". That's not to say I could have been more help than anyone else there, but who knows I MIGHT have been. Being that I've never helped in that situation my natural reaction was just "don't stare at the poor bloke".

I learned a huge lesson that day which I hope will allow me to know what to do if it happens again.

It turns out he was ok, because I did go back, albeit a while later.

Give me a shortened version of the text
<bot>: I have a first aid cert. and didn't use when I could because my natural instinct was that I couldn't help.