@Bass has given the sensible answer. But Grampa is probably trolling us. So I'll go with
because I figure that it's
not a mechanical wall clock, it's a digital display made to look like one. From the picture it looks like the hour and minute hands do show part hours/minutes, but the second hand is pointing directly at 9. Probably the display increments once a second, but in steps.
If that's correct, it follows that
the hands do not pass over each other, like on a mechanical clock, unless they are on a whole step. The minute hand will only be on a whole step when the second hand is at 12, and the hour hand will only be on a whole step when both minute and second hands are at 12. Thus, the second hand only passes over the minute hand on the hour (twenty-four times a day), and the hour hand at noon and midnight (twice a day).