Okay, first, this is a seriously unnerving shot. *grins* I like the dramatic blue lighting - and the crisp clarity of the needle and stream of liquid. Compositionally this is very strong - showing just what you need to, just how you need to, to make the point.
Thank you for bringing up one of my worst phobias without warning. I guess I won't be sleeping tonight! Really, though, great shot. I like how you have the liquid squirting out of the needle - a very subtle addition.