Neighbouring boobies may escalate by jabbing and lunging at each other. Dominance is enforced by lunging, chasing, cuffing, grabbing and biting. They then run around giving the growling call and lunging at each other. Achilles tendinitis is a common injury, particularly in sports that involve lunging and jumping. He catches up to her lunging his claws at her. Defensive signals include hissing and lunging forward with the mouth open. Aggressive behavior includes lunging, vocalization, and chasing. Male aggression toward females is generally limited to vocalizations, lunging, and chasing. Actions such as sitting, squatting, lunging or walking are often selected by the teacher. It typically then begins lunging and retreating at the same time to escape. Pipidae have powerful legs for swimming and lunging after food. This may involve simply lunging to get the racket on the ball before it passes. They attack potential predators by flying at them and lunging with their large bills. For example, the shoebill sometimes uses its wings to right itself after lunging at prey. When she wakes up, she hallucinates Chris lunging at her.