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Message: <blockquote data-quote="OnlineDM" data-source="post: 5598301" data-attributes="member: 90804">I think this is an interesting topic for a thread, and I love learning about the various dice mechanics that are out there. But the stats nerd in me had to speak up on this one...Actually, it's really difficult to roll 10 consecutive numbers under 8. Yes, it will happen if you play long enough, but it's exceedingly rare.How rare? Well, it's (7/20)^10 = 0.0028% of the time. So, every 100,000 times you roll a series of 10 d20s, you'll have them all be under 8 only about 3 of those 100,000 times. That's pretty freaking difficult.And if you meant "8 or lower" that's still only (8/20)^10 = 0.0105%, which is once in every 10,000 times. Still very, very uncommon.But the spirit of your points stands: With a flat distribution, you'll randomly get some streaks here and there, more often than you might expect. You'll roll below an 8 three times in a row about 4% of the time, so that's something we've all experienced.</blockquote>