Okay - top this for a wacky first time
DMing.
After playing Keep on the Borderlands on two different occasions, I was so addicted that I could not get the game out of my head. The second time we actually had dice instead of chips (borrowed them from Greg's older brother).
At this time I didn't own anything (the basic set was Greg's) - but I desperately wanted to play. Keep in mind that I have probably just turned 9 years old - I went to my playroom and designed a map and labelled all the rooms A, B, C, etc. The details from the few times I played were hazy but I remembered Orcs, Kobolds, Potions of Healing, Bubears, hit points and probably a few other things as well.
I placed many monsters in various rooms, threw in a whole load of potions of healing and found some six sided dice from other games. I knew I needed a "different" kind of dice though, so I pulled the spinning wheel out of "Life" (the game by Milton Bradley). I think there may have been 10 different numbers on the Life wheel, so this became my "to hit" die.
I rounded up some friends who were even younger than me and "created" characters and sent them through. Of course, I had no rules - or anything. So I just made everything up!
Spin the wheel - if you get a 7 or higher you hit!
Roll a dice for damage. Collect your treasure.
why don't you cast a spell - how about magic missile?
Drink a potion of healing? roll a six sided die for your hit points. . . only it didn't occur to me to set limits so after drinking about 10 of these the character's hit points really started to add up!
They killed eveything and loved it! They wanted to play some more. . . but the only other thing I remember is that my friend (Greg) said his brother had another module called White Plum Mountain (yes, I meant to write Plum and not Plume).
So I told my eager players that they continued on a path toward a mountain - suddenly a bunch of hugh White Plums wielding swords jumped from the trees and ambushed them!
After a few characters died, the others ran away screaming. . .
That Christmas, I got the Dungeon Master Guide and Players Handbook and things gradually started to make a little more sense.
"Gleemonex makes it feel like it's seventy-two degrees in your head... all... the... time! "