> To add to number 17: accidentally traveling to a zone way beyond your level for the first time.
Or not so accidentally. On my first day in EverQuest, I made a Half-Elf Ranger and entered the world. When I hit level 2 shortly after, I decided to try to meet up with the friend who had told me about the game. All I knew was that he was around level 10, and was in Freeport.
I got out the cloth map that came in the box, looked up the city near where I was (Qeynos), found Freeport on the map, saw that Freeport was to the east, and headed out. . Rangers have a tracking skill, which lets them sense what creatures are nearby, so this isn't as dumb as it seems--I was pretty much constantly mashing my track button and when something scary popped up on the tracking list I had time to stop and figure out where it was before it found me.
My friend logged on and made a Half-Elf Ranger to come join me on the trip. We spend the next couple of hours trying to get to Freeport. My friend had to leave after a couple of hours to go to sleep, but I stayed and kept trying. The farthest I got was to Highpass Hold, where I stumbled into a bandit camp and died, and gave up and went to bed.
If I had not died there, I think I would have had about a 50/50 chance of making it to Freeport. I would have had to pass through Kithicor Forest. That's the Halfling newbie zone by day, and by night full high level undead, and even level 50 players would often wait until daybreak rather than try to pass through Kithicor alone at night. I, of course, did not know that, so whether I could have made it through Kithicor would have come down to whether I arrived in the day and didn't take too long to pass through.
Ahhh...that was a fun night. There's something special when you start an MMORPG that you know virtually nothing about other than what is in the manual and on the cloth map.