I see you've never flown one so you don't understand... Let me explain it to you.
Liftoff before the FDM (more than 9,500 feet remaining), gear up, shallow climb, aircraft accelerates to 200 kts in less than 7 seconds, flaps up, pitch up to 18 degrees, do not reduce thrust from takeoff setting. approx 6,000 - 7,000 ft runway remaining, traveling forward 3 miles per minute going up 2-3 miles per minute (approx).
You are now traveling upwards at 12,000-15,000 feet per minute. The Lear can hold this energy until almost 20,000 feet (it's fun when ATC asks your altitude and rate of climb on radar because the TRACON facility can't track you because your vertical movement is higher than your lateral movement).
40 seconds or so later, you're at 10,000 feet, look down below you, see the runway edge beneath your wing. Maybe an extra 1,000 feet past the threshold but, you get the picture. It's a rocket, it's not for the faint of heart, and I forgot how much I love it!
So, yes, 10,000 feet AGL by the runway end. Actually had it documented once in IAD (although in all fairness, Dulles has a long-a*s runway), along with the fastest time-to-climb to 41,0 ever documented in a Lear (until some Lear 29 guy bumped my spot)
This airplane will do amazing things when it's empty and has only a partial fuel load at low outside air temperatures. All within legal FAR limits, safely operated, just done so smoothly, firmly, and respectfully of her limits.
Sounds kind of familiar...
