My first RPG was AD&D.
In 1977, I’d heard about it for months. Then someone put up a poster at my school- East Middle School (Aurora, CO)- that there was a game starting up in the library. So I joined.
It was run by a kid who could have passed for the love child of Bob Ross & a Hobbit. And he ran his table like a drill sergeant.
My human fighter with a 2HD sword was among the last 2 PCs standing with 2 rooms to go in the dungeon we were in. The other was a Wizard down to his staff and a single Magic Missile.
And then, we encountered a Purple Worm. We tried to retreat, but couldn’t get the door behind us to open, so we had to fight. The Wizard MMed the worm as it closed, then started swinging his big stick. My fighter also waded into melee.
Amusingly, the Wizard’s d20 was HOT. He kept hitting and hitting and hitting…until the worm swallowed him whole.
My d20 was cold; kept missing. But I finally got into a groove just as the worm engulfed the spellcaster. The worm & I were on our last few HP, and we got simultaneous initiative. I rolled poorly and missed; it rolled a Nat20. Game over; TPK.
I was hooked for life!