Thanksgiving is the deadliest holiday for traffic accidents.

"Whether from postprandial exhaustion or a little too much wine with dinner, AAA's biggest travel holiday of the year saw 623 traffic fatalities in 2006, the most recent year on record."
travel.yahoo.com

"Postprandial dip can produce irresistible drowsiness in some individuals, leading to a postprandial nap."
http://en.wikipedia.org/wiki/Postprandial_dip

I hope everyone is extra careful about driving after dinner this Thanksgiving. Have a safe and happy holiday!