If you're going to sleep at work, try not to do it out in the open where people can catch you in the act with their camera phones. Also, you probably don't want to do it while your coworker is busy breaking his back next to you getting the job done.
Granted, he's claiming he was on his lunch break - and people do nap at lunch - but he still shouldn't be laying down on the grass in the open like that. If I were his coworker, I'd take that chance to mess with him.
File that under permanent markers are a sleeper's worst nightmare.
[tags]falling asleep on the job[/tags]