Duplicate Dice Rolls

Tonight I ran a Christmas themed Death House and noticed some strange behavior with the dice rolls.  It seemed that many of the roll results were duplicated from the previous roll. IE/ 2 crits (20's) in a row, I also had 5's, 13's , 14's etc.  So it isn't the same number.  I know it is possible to get the same result twice, but it seemed a little more common then I expected, especially with d20's.  It usually happened when two rolls were taken in quick succession by the same player. It may be possible that a longer delay needs to be taken between rolls?

The QuantumRoll page of the Roll20 Wiki is definitely worth checking out. QuantumRoll is actually more random than physical dice . Further discussion and readings on this topic: <a href="https://app.roll20.net/forum/post/63487/from-the-source-roll20-rng-testing" rel="nofollow">https://app.roll20.net/forum/post/63487/from-the-source-roll20-rng-testing</a> <a href="https://app.roll20.net/forum/post/4517173/skewed-dice/?pageforid=4517352#post-4517352" rel="nofollow">https://app.roll20.net/forum/post/4517173/skewed-dice/?pageforid=4517352#post-4517352</a> <a href="http://cocosci.berkeley.edu/tom/papers/hard.pdf" rel="nofollow">http://cocosci.berkeley.edu/tom/papers/hard.pdf</a>

Tagging on to Ziechael's post. Couple of other things to consider. Even though the RNG is pretty random, that doesn't exclude an experience where there is a higher than average number of consecutive rules. The other item is that the chances, over a large sample set, of rolling two same numbers consecutively is the same as rolling any specific number once. (e.g. the number of times the same number is rolled twice should roughly equal the number of natural 20's, natural 1's, etc rolled).

Thanks for the details. Maybe it was just happenstance. I have seen it happen, even with real dice, I have just never seen that many duplicate dice rolls in one D&D sitting.