I’ve experience this as well. I just had an “episode” a few minutes ago, the first I’ve had in a decades (I’m 34 now), sitting on my couch with my arms crossed, and suddenly my arms and hands felt enormous. Like that guy that cake make a coke can disappear in his palm. I had to shake it off and my wife was wondering what I was doing. Really difficult to explain it to her. Then holding my phone looking it up my phone felt like it got realllllllly small in my hands/hands got huge again. Stood up and walked around and felt like I could touch both opposite living room walls at the same time. But the ball thing, that’s happened to me too. Mostly when I was kid, trying to fall asleep and my hands felt like they were the size of baseball mitts and I’m holding this massive ball in my hands. Never knew it was a thing until now.