Idea for the film:
Instead of a timer in the bomb put any phone on Android or Apple.
As soon as the phone sits down, the bomb will explode.
Agree, it will be even more scary.)
The team of sappers will try to keep the charge as long as possible (reducing brightness, etc.).
In the end of all this, the main character must (instead of cutting red or black wires) replace this unit with an old Nokia)
Finally, the happy end.