... and i don't know how i did it, and what it is called... could someone help?

this trick i made...

i have edited the video... so it comes on time with slowmotion on... then one time with double slowmotion... and the one time again with slowmotion.

Try shooting it so your palm faces the camera. It's hard to tell when it doesn't.

wow the quality is terrible! haha, don't worry, I'm here to help

you don't have a trick, it's a combo:
PassReverse34-23 > twisted sonic23-12

I'm pretty sure that's what it is.. does it sound right?
-Ko

erm i think it's a normal pass34-23 and not a rev pass34-23, but for the rest ko's right imo

Since his Middle finger is sticking out during the trick, I have to agree that it's a Pass Normal.