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And you can think of it as it's actually a wave function. In this case, it's sort of an eminiscence wave. Well, an eminiscence wave. If you have a electromagnetic wave, and you have, let's say, a light, and you bounce it off something reflective. Waves like this, they don't like to be bent. They don't like to be twisted, et cetera. They reflect, but they like to keep going in a straight line. So you get some of this wave that'll pass. If you've got a barrier that's thin enough, it'll pass through. It'll be attenuated, but some of it'll pass right through. Some of it'll reflect, but some of it'll pass right through. And that attenuated wave will show up on the other side as part of this wave function, or wave of the particle. And so that's what enables it to be on the other side, is this portion of the wave that actually makes it through this thin enough piece of material that allows the particle to show up as a particle instead of a wave on the other side of the object. So quantum tunneling, very weird aspect of quantum physics.