I was told this story by an air traffic controller from his time at a joint military/civilian airport. An F-4 (USAAF fighter jet) pilot requested clearance to take off, but due to the amount of civilian traffic the ATC told him he'd have to hold. After a repeated impatient request by the F-4 to take-off the ATC suggested that if the pilot could reach 14,000ft within half the runway length he could take off; otherwise he would have to hold. To the ATC's surprise the F-4 pilot acknowledged the tower and began to roll. At the halfway mark the F-4 went vertically up until he reached 14,000ft, then levelled off. The ATC had no option than to hand the pilot over to departures and wish him a nice day, since he'd met the conditions laid down. The ATC said it was the darndest thing he ever saw. :thumbsup::thumbsup: