Suffers severe seizure on sunny savannah.

FROM WIKIPEDIA: The symptoms within the central nervous system include a localized involuntary twitching of muscles or groups of muscles, seizures often distinguished by salivation, and jaw movements commonly described as "chewing gum fits", or more appropriately as "distemper myoclonus". As the condition progresses, the seizures worsen and advance to grand mal convulsions, followed by death of the animal.

The animal may also show signs of sensitivity to light, in-coordination, circling, increased sensitivity to sensory stimuli such as pain or touch, and deterioration of motor capabilities. Less commonly, it may lead to blindness and paralysis.

The length of the systemic disease may be as short as 10 days, or the start of neurological symptoms may not come until several weeks or months later. Those few that survive usually have a small tic or twitch of varying levels of severity. With time, this tic will usually diminish somewhat in its severity.

http://en.wikipedia.org/wiki/Canine_distemper#Neurological_symptoms