Haha!
If you're careful, you can do it. You can bend, vibrato maybe, the natural harmonic. You can only slide them a couple of frets, and it's harder to do.
You put your finger over the harmonic and pick it, and then carefully slide your finger into the actual fret before without letting the string up, and it maintains the harmonic, and then when your finger is in the right position, you can bend it, vibrato it. Slides are harder, it's sort of like squeezing the harmonic up. You can't slide down.
Well, yeah, I'm trying sliding them now and it's shit so maybe you can't do it.
Ah, maybe not, it's very hard but I got a good one just now.
I've made a video to prove that it's possible!