Flight returns to YYZ

[rfsparkz]

I was watching flights from YYZ on flightaware.com and noticed a flight go out over lake ontario ,do a circle then return to yyz at about 945pm.I heard the fire dept being dispatched at PIA.Anyone else see or hear anything.Planes usually will go outover the lake to dump fuel in an emergency before landing back at YYZ.Sorry I didnt catch the flight number.

 

[pathalogical]

If it didn't make the news, then it probably wasn't serious. It could have been something unimportant as a sick passenger. If it was unruly passengers causing a disturbance, then it would have made the news because of the recent Undie Bomber. I've heard planes returning to YYZ with trouble, but it didn't make the new either.