Name of this trick

So I came across this kids video on youtube and was wondering was the name of the trick he does at 1:08. Any help is greatly appreciated.

The first part is called Mach Whip… then it just looks like he pops it up to dismount and inserts his NTH thumb, opens the string up using his NTH thumb and pull that through… kinda lost after that with the camera angle not sure if its a named trick but the first part is called Mach Whip for sure… has a tutorial on it

The last part of the trick is called nuclear test witch is a picture trick