According to an actual eyewitness in the theatre, the shooter had the perfect position to observe and fire on all exits and aisles. Anyone who popped their head up was shot.
Your question was a barely formed passing thought. An uninformed one at that if you read post #21. Does everyone’s uninformed passing thought deserve its own thread here? “No, of course not”, you’ll answer, “only MINE!” And it couldn’t have been asked on any one of the dozens existing threads? No, have bring attention to one’s deep thoughts!
Learn to develop thoughts, write complete paragraphs, and research your questions, is my advice.
Don’t feel bad, there’ll be a dozen more such threads in the next 12 hours on this site which was once a discussion forum before deteriorating into a chat room of comic book fans.
Disregard #80, please, it was meant for the starter of the thread, not you, sorry.
Add in it was a sell out crowd so you’re packed in there like sardines. Not likely anyone could move quickly. People laying on the floor makes it hard to dash out the aisle. Hate to say it but he picked the perfect scenerio with the victims being in the dark, not worried about a character costume and movement limited.
With a plane, you’re only one or two people from the aisle. A sports arena and a mall are too large for a single gunman to keep control.