A man jumps from a plane and as he descends pulls his parachute only nothing happens so he pulls his reserve and still no luck so as he contemplates flapping his arms like a bird when he spies a man coming up towards him.
Calling out to the man “DO YOU KNOW ANYTHING ABOUT PARACHUTES?”
The other man replies “NO! DO YOU KNOW ANYTHING ABOUT GAS COOKERS?”
Being an astronaut is funny. It's the only job where you get fired before you start work.
Buddha walks up to a hot dog vendor and says, "Make me one with everything."