Somehow earned over 1,200 ip from one game?

We had a 5 man team and the game only lasted 10 minutes (The shortest ever for me, and it was so boring I decided to build tanky because shortening the game-time wasn't a very good idea and also wasn't done properly, but that's for another thread).

Now I've never seen any ip amount like this. This didn't even include the first win of the day bonus. The big percentage, about 66% of what I earned, is titled "IP boost". 800 IP for a 5 man team? That's highley unlikely. So why did this happen? I've never even earned anything over 400 IP before but this is just insane. I'm not saying I don't like it but I find it really underbalanced that IP was earned so easily.