Ok, this is for the biggest difference you have ever had your rank go down in one update.
I was rank 3, than i slipped all the way to 1878, so that was a total of down 1875 places. Anyone ever beat that?

rank 4 to rank... 2000 odd on eastern servers, it happened the day the head rip server was up. I totally owned that myself =]

Hihgest rank decrease?

ok, now in one day it has gone back up to rank 8, is that some sort of yoyo record?

I went from rank 228 to rank 1900 to rank 4 to rank 416

I don't really think this should be a record, ranks are really random.. :s

I think is should be on a percentage of win/loss and not who beat you and what rank they were.

Then you could play one match against an utter noob, and have a 100% win rate. There needs to be more than just that criteria.

A combination perhaps and no rank + or - on unregged? I dont care about ranks personally. But 14 to 1900 somewhat =)

Hmmm I was from 1 to 2498...... yea, I got screwed up the ass, lost a lot cus I was lazy. I'm half certain it's still decreasing XD