Dumbstruck was founded by Michael Tanski and Peter Allegretti at their Albany-based mobile app idea lab, Doctored Apps. It launched at the end of December 2013, and has since attracted tens of thousands of users, according to Joe Masciocco, who heads up strategy for the app. Mr. Masciocco was also kind (and patient) enough to walk Betabeat through a trial run of Dumbstruck, so we could figure out how it works. First, we used our email address to make a Dumbstruck account. Dumbstruck then sent our reaction video—a rather unflattering six-second recording of our eyes and forehead twitching with laughter—back to Mr. Masciocco.