Happens all the time.
This is my Barleywine which I did 5 minutes of 02 Since the og was 1.150 (I also gave it another blast of oxygen @ under 10 hours after yeast pitch, which is recommended by Chris Whyte of Whitelabs for high grav beer.)
Needless to say I had a VERY active fermentation. I blew the lid and it rocked and rolled for nearly a week.
Healthy fermentation is the bomb......literally.