Continuity mistake: In the scene at the diner, where Travis puts a soluble tablet in a glass of water, you can see a plate of open cheeseburger in front of him. But Travis never ordered, nor received any cheeseburgers. He only ordered and received a cup of coffee only. (00:17:10)
Trivia: Director Martin Scorsese makes more then just a cameo in this film, he's the passenger that sits with Travis talking about how he's going to kill his wife for cheating on him with a black man. He's credited as "Man Watching Silhouette".
Travis Bickle: All the animals come out at night - whores, skunk pussies, buggers, queens, fairies, dopers, junkies, sick, venal. Someday a real rain will come and wash all this scum off the streets.
Travis Bickle: [Into the mirror.] You talkin' to me? You talkin' to me? You talkin' to me? Then who the hell else are you talkin' to? You talkin' to me? Well, I'm the only one here. Who the f**k do you think you're talking to? Oh, yeah? Okay! [whips out gun.] Huh?
Travis Bickle: Loneliness has followed me my whole life, everywhere. In bars, in cars, sidewalks, stores, everywhere. There's no escape. I'm God's lonely man.
Question: When Travis goes into his fitness phase, it shows him hovering his fist over the stove fire. Why is he doing this? What does that achieve?
Question: Is there an official explanation to the ending of the movie? Some people say that it was Travis's dream sequence, and others say it was Travis going back to his manic depressive self again. What caused Travis to get so startled when he was looking at the rear vision mirror? Did Scorsese deliberately make the ending very vague or is there supposed to be an explanation to the ending?