I recently browsed through an article in Wikipedia, here is an excerpt:
A recognizable example of the gazelle is Thomson's Gazelle (Eudorcas thomsonii), which is around 60 to 90 cm (23 to 35 inches) in height at the shoulder and is coloured brown and white with a distinguishing black stripe (as in the picture on the right). The males have long, often curved, horns. Tommies, as they are familiarly called, exhibit a distinctive behaviour of stotting (running slowly and jumping high before fleeing) when they are threatened by predators such as lions or cheetahs. This is a primary piece of evidence for the handicap principle advanced by Amotz Zahavi in the study of animal communication and behaviour.
The Thomson Gazelle actually does a high leap while being chased by a predator (which is ostensibly counterproductive to its survival!) before sprinting. This behavior is hypothesized to actually signal to other predators of its competency and fitness, possibly discouraging a predator from pursuing that prey and opting for a "less fit" gazelle.
I can't help but conjecture that we humans must exhibit that behavior in some way, shape, or form. Just curious, what examples can you think of where you have witnessed/or yourself exhibited your own type of "gazelle jump." Silly question, I know, but try to take this one somewhat seriously. Maybe you have done a gazelle stot during a job interview, competing for a girl/guy's attention, or even flashed one during a group project. All input is welcome.