Pilot here, for anyone confused about the comment... some aircraft reach a speed where it is near a stall and cannot create a positive climb gradient when it to

Pilot here, for anyone confused about the comment... some aircraft reach a speed where it is near a stall and cannot create a positive climb gradient when it touches down. Generally increasing angle of attack (angle the wings are with respect to the airflow) produces more lift. This works until a point is reached where the aircraft stalls (slow speed or high AOA, there is a curve). Many aircraft land near this airspeed, it produces a nice landing. But if you are faster than this airspeed, you can still pull up and create more angle of attack, create more lift, and take back off. So if you are landing fast you can easily pull up. This is exaggerated in fighter aircraft where we land at speeds that are faster than the stall threshold and a drastic pull up at landing can almost always cause a climb.