Edgar's Last Minute
Fox's 24 site has a bit on "Death by Nerve Gas" following the gassing of 40% of CTU. In the segment, they list the various symptoms of nerve gas poisoning - starting with blurred vision and ending with suffocation.
It doesn't explain why Edgar is holding one of his man-boobs as he went down.
On a lighter note, make sure to get your submissions in for the third installment of The Carnival of Bauer!!!.