Incorrect use of: clutch / brake / accelerator / gears

  1. You must not get pedals mixed up during a turn. You must downshift into the proper gear before a turn in a standard transmission as both hands should be on the wheel for the turn.  
  1. This could cause a collision or loss of control.  
  1. Would normally be a minor or major mark. 
  1. Practice, especially on a standard transmission, will help to prevent this as foot position and proper gear will become muscle memory.