Using a fan to print aggressively acute angles.

This is a simple fan guard so I won't harm my fingers while holding a small fan.

Why am I holding a small fan you ask?

I've been working on something and needed to print overhangs with aggressively acute angles without using supports. I noticed I can get angles down to about 15 degrees and still have a quality print if I blew on the hot ABS as it is printing. So I ran down to Radio Shack and bought a small fan.

The picture is of 5x5x10mm cube with a 1x1x10mm arm coming off at a 15