Question

Question I guess it's not common among people who stutter, but I notice one person that I know, who stutter, flails her hands and arms when she's stuck on a word. I didn't to ask her why does she move her hands in a flapper manner because I didn't want to pressure her - but is part of the brain that's causing this? Or do you think it's almost like a phsyical technique to almost physical get the word out?