If the airborne person has any doubt about the supporting person, they will not go freely into the air and the aerial immediately becomes difficult if not impossible to successfully complete. The supporting person must do whatever necessary to keep the airborne person from an injurious landing. It is quite easy for things to go awry during any one or several of these stages. Please note that an aerial can have a good preparation and a good airborne execution and still end with an off-balance injurious landing. Also, it has happened that the airborne person has finished a rehearsal feeling tired but otherwise well, only to notice hours later that one foot feels sore and tender, and a few days later discovers a stress fracture or worse in the foot or an injury to the ankle, calf or knee.
Some tricks can also pull muscles in the shoulder or back of the airborne individual.
Again, it is not uncommon to finish a rehearsal feeling fit only to wake the next morning, lean over to put on your socks and experience sudden, excruciating, and unrelenting back pain. Pain that goes from the inner center of the shoulder blade up into the neck are also common. Other professional lindy hop dancers in England, Sweden, and Germany have their own very effective and safe methods of rehearsing and teaching aerials as well. However, even with experience, many dancers have experienced injuries working with aerials. Doing aerials is not to be taken lightly.