Wow 300 btc? Really? He won 300 btc just from a dice game? This is unbelievable.
Some people will think it's a stupid thing to place some big amount money in dice game. But look, he won a great big one amount. Congratulations
300btc win might be big in the new bitdice, however its not really big if we talk about wins from all bitcoin dice sites such as betking and primedice, IIRC Hufflepuff won around 2,000BTC a year or so ago and in betking you would see bets like 50btc or more and winning xxx amount at the end of the run.

Congrats wonton22

Hufflepuff was not a winner, he is a cheater who takes advantage to exploited Primedice's bug. He did that not in a year ago, but on November 2014(
https://bitcointalk.org/index.php?topic=843892.0) calculate yourself how many years ago that.
Doctor was won around 500
BTC in Bitdice (More than this winning) on 2 years ago or so.