an incredible ruth goldberg machine that looks like is been put together with the things you don't know what they were for in the first place and takes about three minutes to do its run. >> i love these because i'd never have the patience to figure all this out. it's fascinating to watch. >> using things from around the house. >> apart from 140 hours of effort and 114 fails. >> thank you. >> the outcome is a cold soda. >> you would think but the outcome say lukewarm room temperature soda. jammies. >> one thing we know about pranksters is nobody is exempt. not the kids, not the wife or girlfriend, and surely not mama. this is kael and he' about to tell his mom some news he doesn't like. mom just came in. puts her bag down. youu see kehl and some of the family members sitting on the couch. >> who is pregnant? are you pregnant? >> no, she's not. >> yes, she is. >> it's like she already knew when they said sit down. >> he tells his mom that his girlfriend texted him today and told him she was pregnant. >> that's how millennials would do. >> she just sent him a picture of the text. >> do you