A friend did that in a 70 RR. He had a 57 Chevy that he raced in a gas class. He had bought the RR to replace the Chevy and to get into a stock class. His first pass in the RR wasn't good.... The car had one of those early Hurst "auto sticks" that looked just like a stick shift. He staged, went to shift to second... did the shifter right (at least) and stabbed the brake pedal with his left foot.
It was embarrassing, but no damage. It was his last pass down the drag strip though.
The second to last pass was more disastrous. He wrecked the 57 Chevy.
The guy that was helping him had the steering wheel off.... It had that black stripe on the wheel that tells you when the car is aimed the right direction. Did his burn out etc. and staged the car, making sure the black stripe was at 12 o'clock as it should be.
His helper hadn't put the wheel on right.....
He dropped the clutch and the car carried the wheels through first as always. He hit the clutch to shift and the nose went back down... with the wheels cocked over to the side just enough to lose it. He ended up rolling the car.
He was a good wrench... and kept racing, but with a "hired gun" in the driver's seat.