I think over the course of the night we had 1 nat 20 (not counting the one that was rolled just as an "evens or odds" roll) and about 8-9 nat 1s. I rolled 6 consecutive single digits at one point. Fortunately the only 20 saved my character from being possessed so that was nice.
Out of boredom I rolled my cheesex d20 500 times and recorded the results. Turned out it was nowhere near uniform distribution, 20s being double uniform, and 1s being triple. I called it my chaos die.
Cursed die idea: a D20 with a normal distribution.