When the heavy-laden monster finally rose, the crew opened the hatch, only to see the ground still hugging them.
The heavy-laden uterus can press too hard on the big vessel (vena cava) carrying blood back to the heart, and thus cause a dangerous drop in blood pressure, or shock.
Many airplanes, especially heavy-laden bombers, are launched by booster (jato) rockets whose powerful push gets them into the air without too long a take-off run.