I was trying to overtake a cruiser that was coasting. There was about 1.5 meters between the wheels on my bike and the cruiser. When my hip was about even with the rear axle on the cruiser, the lady started pedaling and the cruiser swerved causing the two of us to collide. Up until the the lady started pedaling, the cruiser was going in the straight line. Why does a cruiser deviate so much from a straight line when someone starts pedaling?
I know my bike oscillates sometimes when going up steep hills, but the oscillation is not 1.5m.