JD's stalls, can someone make a tutorial please?

I really like Johnnie Delvalle’s stalls, but I can’t figure out how he does them. Would anyone please make a tutorial for how to do them? Thanks in advance.

For stalls, just grad the yoyo and try to restart it. Hold it tight with one hand on top and one on bottom. Move the one on top forward, using the other hand as a ramp to roll the yoyo down.

For when he stalls the yoyo on his shoulder, it’s done by throwinjg a really really weak throw, -or using the spin on a long combo- and binding it, but instead of catching it, he swings the yoyo up onto his shoulder to get it to stop.