And keep an eye on the countdown timer.
I have never figured out why every good guy assumes the bad guys set sion’s box (er, the bomb) to blow up at 00:00.00.
Why not use 1:58.03 ... just to confuse the screenwriters.
And what if his box was set to go off on March 1 of a leap year after the daylight savings time changeover? Wouldn’t that really screw things up when the plane flew east across the dateline and that date never happened?