So the other day my brother and I were flying down the 407 EB near the 400. I would estimate we're doing around 170-180km/h. I notice an unmarked cruiser in the middle lane and slow down to 120km/h. My brother notices the officer later than I did and ends up passing him doing around 140 km/h. Seeing the officer pacing him, I get in between the cop and my brother, constantly varying my speed between 85-110. My brother pulls away with the cop still behind me. The officer follows me for about 1.5 kms before putting on his lights and pulling me over. The reason behind it was I was changing my speed so he suspected I was impaired. Took my license back to his car, came back said don't be stupid and drive the speed limit.
So, out of curiosity, what could I have been charged with in that situation?