A C-130 Hercules cargo plane was lumbering along when a cocky F-16 flashed by. The jet jockey decided to show off. 

The fighter jock told the C-130 pilot, 'watch this!' and promptly went into a barrel roll followed by a steep climb. He then finished with a sonic boom as he broke the sound barrier. The F-16 pilot asked the C-130 pilot what he thought of that? 

The C-130 pilot said, 'That was impressive, but watch this!' The C-130 droned along for about 5 minutes and then the C-130 pilot came back on and said: 'What did you think of that?' Puzzled, the F-16 pilot asked, 'What the heck did you do?'

The C-130 pilot chuckled. 'I stood up, stretched my legs, walked to the back, went to the bathroom, then got a cup of coffee and a cinnamon bun.'