I've seen the discussions about the cracked crystal in Kylo Ren's light saber causing it's shaky appearance, but why do his other force effects wobble and shake?
Near the start of the film, he freezes a blaster bolt and it hangs in the air shaking.
When he uses the force to freeze people, they shake.
I don't remember anything like this in the other movies. I haven't seen many of the Clone Wars shows, so I don't know if there's a precedent there either.
Clearly Kylo Ren is strong in the force (I don't recall Vader ever freezing a blaster bolt, just deflecting them. Maybe he just didn't want to), but is the shakiness a sign of his lack of training? Is he using brute force rather than finesse?
(The obvious out of universe answer is that it just looks cooler, but I'm wondering if there's an actual in universe answer.)