True story....if any "Beale Bandits" are here, they can confirm...
KC-135Q refuels "the Sled..." to full tanks. Then makes a bet with the Sled crew: "First to FL500 wins, loser buys the beer at the Smokehouse Inn at Mildenhall." IF the Sled crew agreed (they were good folks, as they usually did)...the race was on.
And almost always the KC would win. Why? Because the Sled was heavy...and would wait to initiate its afterburners and ramjet technology until "up higher..." so what you'd see was....the Sled coming up...in second place and then slowly moving forward and upward....slowly, slowly, and then....a burst of bright white plumes and GOODBYE SLED! It'd angle up and disappear.
Seven or more hours later when you walked into the Smokehouse for your "free beer" there'd be the crew...drunk...asking what took you so long, they'd been there for hours...