David Holmes, 25, Daniel Radcliffe's stunt-double, was seriously injured on the set of Deathly Hallows. He was performing an aerial sequence when he fell to the ground following an explosion, which was part of the stunt, and sustained a serious back injury. Although he initially hoped to return to work, it has since been reported that Holmes is paralyzed and now uses a wheelchair.
Harry's lightning bolt scar was applied by make-up teams approximately 5,800 times by the end of the series. Daniel Radcliffe had the scar applied 2,000 times while the rest were applied to stunt doubles and stand-ins.
Rupert Grint and Emma Watson stated in an interview that they both had casts made of their buttocks ("bum casts") which were used to make the bicycle-like seats mounted on the broomsticks in order to make them more comfortable to ride.