...A Mr Potato Head explodes. Alan says: "The flash is the key, that and the detector/trigger. I use a home built flash based on a model built in the 1950s by Harold Edgerton. The flash is really fast about 1 millionth of a second and it stops the action. The detector/trigger is also critical. It detects that the debris from the explosion has arrived and fires the flash at just the right instant. Getting that right instant is the art and can take many tries." Picture: Alan Sailer / Rex Features

Credit : Alan Sailer / Rex Features