I can see where the problem was...
Not wait a minute!
I thought this was something he actually made from the ground up. Like with actual soldering and electronic components.
It looks like he just took apart an digital alarm clock and attached it to some sort of case. What type of skill is that?
I could be mistaken but it looks like he hooked a digital clock to a circuit board and the board to a battery connector. Seems like a needlessly complicated way to power a clock.
The little briefcase looking thingy is a pencil case, (look at the plug), and appears to be roughly 8 inches wide. Not a full sized briefcase. At least he didn’t chew his pop-tart into the shape of a pistol.
THAT’S a clock???!
Hell, I’m a lifelong tinkerer and I would have a tough time saying for sure this wasn’t the makings of a timebomb, less the TNT of course.