I am not sure if this is the right place to ask this, but looking outside the speedrunning community I haven't even seen people really know that the glitch really exists.

I am talking about the glitch where you pick up a NPC to throw them, cancel the throw and then they are stuck to your body.

I have tried this for quite a while now, but I have never gotten it to work. I tried to replicate the timing seen in speedruns, but I just can't get it to work. Any advice?

Is playing on keyboard allowed or do you have to use a controller?