Fizzle

From Guild Wars Wiki

Fizzle is the term used to describe a skill activation that does not successfully finish. A fizzle is the opposite of an execute, or successful execution. The reason for a skill being fizzled are varied:

• Interrupts are a common cause of fizzles. Generally caused by another player or enemy NPC using an interrupt skill.
• Cancellation is another common cause of fizzles. Attempting to move during a long activation time or pressing the escape key will cancel the skill causing it to fizzle.
• Activating a skill when it is recharging can also be a common cause of fizzles.

[edit] Note

Fizzles are signaled in the game by a clicking sound.