Well I suppose they would be firmer than finger nails, and given he probably didn't have a tooth pick...
That is just vile. If you really didn't need to be there, I'm sure you would have left . . .
Seriously. Run, don't walk . . .
Of all the strange things we do, this is hardly the grossest. It isn't the most hygienic thing, but it could be worse.
Sicko! Is he close to the mental ward? If not, you can put toenails down the hall, through the ward door, he should follow them without question.
eww... i'd puke