specializes in useless ininvestigations, creating the donald trump hand shake robot so he could test various anti-grab and yank measures. >> first we'll try regular hand shake. hand on shoulder. okay, i'm going to try squeezing his hand really hard. >> reporter: the robot is timed to yank randomly to keep the element of surprise. when none of the techniques worked, he offered to fit the robot with a fist bump. but perhaps the most mess rerizing re-creation of the presidential hand shake was done by a cgi artist in sweden. this was kid's stuff for this man who works at home on his farm. so how long did you spchbd on this animation? >> reporter: even harry potter