I've done a few pointless things over the years, but I think the most pointless ones being:
I realized I was dreaming and decided to go on a beer run, couldn't find any beer, woke up.
Another one was realizing I was dreaming and then wondered what I should do, then woke up.
I Think the one that takes the cake would be when I accidently conjured up a spider in my dream, and scared myself awake. I was thinking to myself, whatever you do don't make any spiders, so naturally thats what happened, just one ugly little spider, and it wouldnt leave me alone.
There was another time I became lucid (this was one of my earliest ones) I decided I could do whatever I want so I saw a pretty woman walking on the sidewalk, so I figured I would go over there and bang her, but in the process I got distracted by an orange lamborgini parked in front of the store, needless to say I looked at it too long and woke up. I was pretty disapointed in myself for that one, She probably would have been my first lucid bang!