Tilting because you win a couple of pots?

Just wanted to discuss this with my fellow noobs.

I have played a tiny amount of online hands (approaching 1K), I try to play tight, try not to chase when not warrented, etc- but everytime I win a few pots, I start to get a bit too excited- I usually end up loosening up a bit, chase more- and the pots slip away!

I always associated tilting with doing badly, not tilting because you're doing well?!

Any thoughts, feedback, advice really welcome.

Cheers,
Ian