this is 1 of harrys quotes: I did mention somewhere that the art in getting this type of photo is to use flash set at low level power (around 1/32-1/64 power as this freezes the action not the shutter speed). Shutter speed for the watersplash was 1sec.
this is what i want to try but i didnt know anything at all about flash speeds (not even that there was different speeds lol) ive just realised its power aswell not speed