Hand Wistle

So yesterday while I was grinding away on a drawing at work, I stopped for a second to think and blew on my fist like my hand was cold. I startled myself when it made a loud whistle.

So what did I do? I did it again! and again, and again, and again... That's the way I roll.

After a minute or two playing with my "hand whistle" decided to open my fist and try to repeat it. No such luck. I wasted another five minutes of my day blowing on my fist getting nothing. ( I tried a few time's while typing this, no luck)

Good thing I was alone that morning...