"Fart ass" joke

there are three men in a plane, an australian, a japanense and an american, the plane is rapidly runing out of fuel, the pilot turns on the autopilot and leaves the cockpit too tell the men something, the pilot says
"look guys the plane is running out of fuel, you will need to drop something out the window.
The japanese throws out a samuri sword, the ausralian throws a baby wallaby and the american throws a greande.
The next day, the australian arrives home to his father crying, the man says
"whats the matter dad"
his father replies
"yesterday i found your baby wallaby splattered all over the back yard"
The japanese got home to his father crying aswell so he says
"whats wrong dad" his father replies
"yesterday a sword fell out of the sky and killed your mother"
The american got home to his father laughing his head off so he says
"whats so funny dad" the father replies
"yesterday i farted and the nextdoor neighbours house blew up