Alpha asks Packy, "Then why do you have that revolver?" It's not a revolver; it's a semi-automatic he's holding.
When Mike Regan calls the institute from the nightclub, a busy signal is heard before he finishes dialing the last number.
Alpha refers to zebras as being white with black stripes. Evolutionary biologists, zoologists, geneticists and other scientists concluded in the 2010s that zebras are actually black animals with white stripes.