A CO[sub]2[/sub] spill appears to have occurred here:
The symptoms of carbon dioxide poisoning such as headache, lethargy and nausea can be mistaken for other more common illnesses such as the flu. Mild carbon dioxide poisoning brings symptoms such as elevated blood pressure, twitching muscles, flushing, discussions about English Majors in a thread about carbon dioxide, and reduced neural activity. This level of exposure causes illness but not death. As the severity of exposure or length of exposure increases so do the symptoms to include headache, lethargy, panic. convulsions, stomach pain, irregular heartbeat, chest pain, memory problems, landing long, and unconsciousness.