I say the old handkerchief-dipped-in-formaldehyde works for me. Then you can just claim they passed out over seeing their favorite bishie.
I think you meant chloroform. Formaldehyde is sometimes used in biology class to preserve dead specimens.
*don't actually do this!! chloroform, although sometimes used as an anesthetic is toxic and can cause serious injury and death*
yes! Let us smother them in embalming fliud!