I was trying to be a little tongue-in-cheek. Kind of a "blond doing the coin-on-barrel drill" joke. Plus, since there seem to be variants of the drill - coin on barrel, coin on sight, coin near rear sight - I thought I'd add my own. Again, tongue-in-cheek. Finally, I've not seen it done before and I loved the challenge.
Getting to pic #1 was tough. No tricks. No photoshop, glue, tape or altered coin or barrel. Standing, place the coin with the weak hand, lower the weak hand, hold the coin and pull the trigger. You'll note that my strong arm's not extended, and the trigger's only very slightly pulled, yet it was tough even getting to this point. Getting the coin balanced while assuming the position of pic #2 would likely take years of practice, if it's even possible. Something in between is do-able, though. Sure, it proves nothing, but I enjoy the challenge.
The benefits of this "drill" may not be obvious, but it really highlighted to me how difficult it is to really be still and calm. Maybe minutiae for many forms of shooting, but I'm betting bullseye and 10m air shooters would agree that finding your "inner stillness" is important, but deceptively difficult.
I was hesitant about posting a picture with my finger on the trigger, even if it's a dry fire drill. I appreciate the concern. Seeing the same pic posted by someone else would likely raise my eyebrows as well.
edit: Check out the Holiday Handgun Match. It's a sticky at the top of this subforum. If you dry fire, and do well with the standard coin drill, you'd likely do well in this match too.