Nark referred to Maynard Ferguson's belief that the secret of brass playing is successfully performing well on the nights when you don't feel your best. Nark then mentioned his belief that a short warm-up with lip buzzing is more desirable from a practical standpoint. The final topic concerned the development of range. Nark demonstrated how the tongue placed at the base of the lower teeth and gums with the back of the tongue arched will improve range. He also related that the opening between the teeth must remain open.
Movement here can cause increased pressure on the upper lip, effectively stopping vibration.
Ending the discussion, Nark reminded the audience that playing trumpet was like riding a roller coaster.