The whole entire film is quite tense but with a witty side.
A guy is told he will be fired if he doesn't make a good impression.
There are several scenes where people are up high, trapped in elevator cars, lifts.
Elevator lifts fall up and down at an alarming rate. A man slips and falls through 30 floors but rubber nets keep breaking his fall. He is nearly decapitated in a suction fan and later by an elevator maintenance lift. Elevator doors slam shut.
A man and lady get trapped in a fiery room. The sprinkler system won't work so the system takes away the oxygen. The lady nearly passes out and when she comes to her face is very blue.
A man and lady get trapped in a chamber where the temperature drops rapidly. The PA system says that body parts will cease to work at various temperatures and explains how and when at each temperature.
A guy gets trapped in sauna and frantically/vainly tries to get out.