Haven't got time to read all the replies right now, although I expect what I'm about to say will agree with the vast majority.
Yes, you were stupid. I'm glad it went ok for you, and you apparently enjoyed it - but don't do it again.
One of the scariest things I've ever done in an aeroplane was a simple loop. I'd just completed a 10-hour aeros course, so I knew at least roughly what I was doing, but this was a new aircraft. I pulled too hard, stalled, got confused about whether I was upright or inverted, and tried to recover from an inverted stall instead of an upright stall, which only made the problem worse.
Fortunately, there was an experienced instructor sat in front of me.
FFF
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