Another one for Zanzer Tem. I tried running it for my dad after only having played one game with a friend of mine (we were nine). I obviously still didn't understand the rules because I had him rolling to hit (hit, not damage) on 1d8 and he died in the first room.
The first published module I played in was B2 Keep on the Borderlands, DMed by a friend's uncle. We tried on and off for about a year to beat that module but the attrition rate was very high - our PCs were always offing each other. The DM created a house rule that if your character dies, your new character starts two levels lower than your last one (minimum 1st, of course). Eventually I managed to get my cleric, Lliria, to 3rd level and when one of the other characters retired, he willed her his suit of plate mail. Yes!