An airplane is flying over the Atlantic when suddenly...

One out of four engines explodes. The pilot says over the intercom, "Ladies and Gentlemen, we lost one out of four engines. This is no cause for panic, as we still have three engines that work fine. However, instead of the two hour flight we planned, it will take us three hours. Thank you for your patience."

All seems fine until an hour later, when another loud explosion sounds. The pilot once again comes over the intercom and says, "Hey there, folks. No need to be alarmed; we lost another engine, but rest assured this airplane is still perfectly safe. Unfortunately this makes our delay an hour longer. Thank you four your cooperation."

Another hour goes by without incident, when there is another explosion. "This is your Pilot once again...we lost our third of four engines, but don't worry at all, we are still in good shape. I am sorry to inform you that we will once again be delayed and it will take us five hours to get to our destination. We apologize and thank you for flying with us."

One passenger turns to the next and says, "At this rate we'll be up here forever!"

Edit: Fixed punchline. Thanks worthless_noob! you are not worthless at all!