Why do people do that constant switch ball hand thing

Sometimes people I play once they get in the open field, they constantly switch the ball back and forth between hands all the way to the endzone. 

1. How do you even DO that? Lol

2. WHY do they do this? Do they think it makes them run faster or something? It doesnt look like it does, but it looks goofy as hell and for some reason it annoys the hell out of me and I might just quit on the spot assuming its an annoying little kid or someone id rather not spend the next 20-30 mins playing anyway. Lol

They think it throws off pursuit. On Xbox you spam RB I think. I never do it so I’m not certain.

1) you press R1 or RB 

2) I think it was like 2 maddens ago Dline tipped picks and return for td where super common(they have toned both down a lot)  and when returning these play you ran out of stamina faster so people would do it bc supposedly the "switching hand" animation was faster than the out of stamina animation.  Then last year it was noted that it changed the pursuit/messed with your hitbox so poeple still used it.  This year if people do its probably just out of habit( and not to stunt or mess with you).

It is not a taunt. I have used the past couple of years and I am convinced it maintains speed + stamina, not sure about the pursuit angles.