Man in a cinema watching a cowboy film. A stagecoach pulls up, man 1 turns to his neighbour and says "I bet you a tenner that the first cowboy bangs his head on the doorframe." Man 2 accepts the bet. The first guy out banged his head so man 2 pays up.
Man 1 feels guilty and gives back the tenner, says "I'm sorry, I saw this film last week, it made me feel bad taking your money."
Man 2 says "So did I, but I didn't think he'd be daft enough to do it again."
A cowboy walks into a bar and sits next to a beautiful woman He gives her a quick glance then causally looks at his watch for a moment.
The woman notices this and asks, "Is your date running late?"
"No", he replies, "I just got this state-of the-art watch, and I was just testing it."
The intrigued woman says, "A state-of-the-art watch? What's so special about it?"
The cowboy explains, "It uses alpha waves to talk to me telepathically."
The lady says, "What's it telling you now?"
"Well, it says you're not wearing any panties."
The woman giggles and replies, "Well it must be broken because I am wearing panties!"
The cowboy smiles, taps his watch and says, "Darn thing's an hour fast."
Since the bartender is not a chemist, he has no idea that H2O2 is the chemical formula for hydrogen peroxide, and gives both chemists a glass of water. Expecting that one to end a little differently, too? If you’re unfamiliar, this is the (rather dark) way that joke usually ends. Plus, check out some more brainy and hilarious science jokes.