As it happens the exact term used was "Getting a bit sticky."
When a British Army Officer starts to use those terms, along with "interesting" & "complicated," the exact American equivalent is " OH S....T, OH S.......T. WE ARE GONNA DIE!!!! "
That's the problem with us Brit's, we are much too fond of understatement. <img src="/images/graemlins/grin.gif" alt="" />