Pentakills

So last night I got four Pentakills with two in the same game in nearly three consecutive games (maybe one non-penta somewhere in there). I read a while back that the statistics of a Penta is one in every 1500 games and I honestly can't tell you that I've ever had one before, I want to say I have but it had to have been season II or III because I can't remember it specifically. Has anyone else ever went super ham like that out of the clear blue? I'm pretty proud of myself to be honest but I'm sure it's some kind of fluke where I was matched with opponents a lot lower than me or something. I'm not a terrible player by any means, but four Pentas almost in a row is a little disturbing compared to my typical random Triples.