Tom
I cannot take credit for that.
I set the camera to take 10 shots a second.
Hold it ready, tell the archer to draw and hold.
As he holds I press the shutter button, and shout fire.
So the camera is taking 10 shots a second as he releases the arrow.
I see the arrow has gone and release the shutter.
Do that a few times and I have got lots of good shots of the arrow in the air.