This track plays when it's time to... PANIC!!!!! Well, that or a lot of trouble is coming your way. One of my fondest memories in the original game was the Atlantic Accelerator mission where you'd hear maybe two notes from "Assassinate" before it quickly switches to "Danger" and then all hell breaks loose as Gauss Guns are firing all over the place.
Danger also seems to be a favourite track to remix as even Skrillex has created his own version of this iconic theme for the Syndicate game released in 2012.
[ VIDEO: Choicest VGM - VGM #222 - Syndicate - Danger ]