Finger Slaps on Ukulele?

I know that Sungha Jung does it all the time, and he even does it in his ukulele interpretation of "I'm Yours." I was wondering if there were any tips on doing this, and maybe other ukulele players that use this technique as well.

I think it's called Slap Harmonics. Basically where you slap all 4 strings at the desired frets you want to produce the harmonics at. (Gotta do it quick too, so you fingers don't mute the strings right after it)

Are you talking about using finger slaps to add a percussive element to your playing? I always viewed that technique as more of a guitar thing. I'll usually just chunk if I need to add a little flare to my strums, but if you're gonna use finger slaps make sure to not anchor down your pinky when you're picking.