Transportation Safety Board of Canada - AVIATION REPORTS - 2009 - A09O0117
Only a bit of turbulence actually. In fact while in cruise they had an ADC failure leading to a sudden overspeed indication on the captain's side. Thrust brought back to idle while the autopilot climbed. Captain disengaged the autopilot and manually pitched further up to 12 degrees until the stall warning activated(along with the continuing overspeed warning). Stickshaker lasted almost 2 minutes intermittently.
After recovery, they diverted to Toronto. There was no longer an overspeed indication at the lower altitudes. While burning off fuel in a hold at 10,000 feet, a separate incident happened as they let the airspeed bleed off after reducing thrust to idle. The stickshaker activated and altitude was lost so 111% thrust was selected but they then climbed up to 10500 and had a TCAS RA.
Rest of the flight was uneventful.