Speed
A bus has a bomb on board, which will explode if the bus's speed drops below 50 mph. It's up to Keanu Reeves to save the passengers and catch the mad bomber. Doesn't sound like much of a plot but it's a pretty good story with a lot of action, a few nice explosions, and what is probably the longest chase scene in movie history.

Good casting, too; Dennis Hopper makes a
very convincing psychotic bomber. I'll definitely be watching this one again.

Rated
R; Runtime = 1 hour, 25 minutes.
Sandra Bullock was a knockout, by the way.
