Brilliant! How do you guys always manage to find the relevant ones? There's hundreds of them, and I tried a few google searches using site:xkcd.com and some related terms and couldn't pull up this one.

It's an art. You are either born with or have to learn it "the hard way". ;-)

Kinda like spitting (with high initial thrust and decent precision). Or doing a double-snap thingy with your thumb or other extremity.

I was born capable of all three. I still wonder if I'm destined for Great things, or just a freak

Either way you must have made a name for yourself in your circle and more. I envy you for the 'snapping' prowess. However, as far as spitting goes I might qualify to be a master spiter(please read as in sniper).

By the way, just high initial thrust and precision are not enough you have to got to use the ammo in the right amount w.r.t. distance and all. Not to mention you have to mind wind conditions, otherwise the drop might land at someone standing/sitting/moving near by.

" Not to mention you have to mind wind conditions..." I can calculate the vector angle, wind considered, to almost 0.99% accuracy. Zero dot nine nine, my friend. While driving on the freeway.

"...otherwise the drop might land at someone standing/sitting/moving near by." But then there's no reason to spit in the first place, is there?

The XKCD-Oatmeal theorem. For every wonder-why that is spawned in the universe there exists an appropriate XKCD and/or Oatmeal.