1970 Mexican Grand Prix

The race was originally scheduled to start at 2:30pm but the crowd of 200,000 was difficult to control and almost forced the cancellation of the race. They were crammed in front of the guard-rails, sat at the trackside and ran across the track itself. Despite appeals from Jackie Stewart and local hero Pedro Rodríguez they still remained troublesome. It cause the start to be delayed to 4:00pm.

From the start, Jacky Ickx led from Stewart and Clay Regazzoni, but dropped back with steering column trouble. Later, a collision with a dog which had escaped onto the track damaged Stewart's suspension and forced his retirement, leaving the Ferraris dominant in first and second. Jack Brabham retired from third place in his final Grand Prix when the engine blew on lap 53. The Ferraris romped home with Ickx leading Regazzoni and Denny Hulme claiming the third podium spot.

The crowd control issues led to the Mexican Grand Prix being dropped from the 1971 calendar. It returned to the Formula One calendar fifteen years later in 1986.