“Humor, utrikisk”…

“Tower communications” (Strangeplaces.net)

Tower: “Hotel Papa Oscar climb four thousand to six thousand and maintain.”
Pilot: “Hotel Papa Oscar, climbing flight level 100.”
Tower: “Hotel Papa Oscar, climb to flight level 60 and maintain.”
Pilot: “But 4 and 6 is 10, isn’t it?”
Tower: “You’re supposed to climb, not add.

Och en favorit från xkcd:

Och en till, rätt nördig:

Jaja.