In roller coaster terminology, what does "airtime" refer to?

Airtime in roller coaster terminology specifically refers to the sensation of weightlessness experienced by riders when they are briefly lifted out of their seats, typically during certain elements such as hills, drops, or inversions. This sensation occurs due to the coaster's rapid changes in speed and direction, creating a momentary feeling of free-fall or "floating." This element of thrill is a highly sought-after feature among enthusiasts, who often consider airtime hills or airtime moments to be key highlights of a ride.

The other options do not accurately capture the essence of airtime. The height of the first drop impacts the overall experience and adrenaline, but does not define the sensation of feeling airborne. Speed contributes to the thrilling experience of a coaster but is not synonymous with the experience of weightlessness. Similarly, the number of loops may lead to a thrilling ride but does not relate directly to the unique feeling of airtime itself.