It is also a complication associated with anesthesia. The spasm can happen often without any provocation, but tends to occur after tracheal extubation.[1] In children, the condition can be particularly deadly, leading to cardiac arrest within 30–45 seconds, and is a possible cause of death associated with the induction of general anesthesia in the pediatric population.[2] It can sometimes occur during sleep, waking up the sufferer. This usually occurs when the person has gastric acidity and develops re-flux during sleep, where the gastric acid causes irritation which will cause the spasm attack.[2]