ForceUser
Explorer
Here's mine: a DM who is now a good friend and long-time member of my game group once used to roll all the dice for a game session the night before and print them out on a sheet of paper. Then when the session began he'd just consult the sheet every time a die roll result was needed and inform us of the outcome. We found this an extremely odd way to play D&D, with no dice rolling at all, but merely consultations of his prerolled number sheet whenever an attack roll or saving throw result was needed.. We eventually convinced him to let us roll our own dice, but he maintains to this day that statisically it's exactly the same. I suppose it is, but it was just too wierd for us. Rolling dice is a big part of the fun.