Generally speaking, weapons are not allowed in hospitals. In some places, combining the two will land you in jail (if not the mortuary). Nevertheless, I found out today that after making a donation to Forsyth Medical Center, the staff will happily send you home with your very own grenade! Their give-away version will be missing its detonator, and you will of course have to source your own explosive. If you fail to provide these components, the best you are likely achieve upon throwing one is causing others to vomit.