Action, Adventure, Thriller
Alec Baldwin found his fight scene with Henry Cavill particularly challenging to execute because of Cavill's sheer size and musculature. Baldwin's comment about the encounter, "I had to do a fight scene with Henry Cavill and Henry Cavill as everyone knows plays Superman. ... ...
When the clock stops, Ethan Hunt will lose everyone he cared about.
HALO is an acronym and stands for High Altitude, Low Opening, not Low Oxygen as quoted.