Don't spit in church-yuck! And why would you want to anyway? I realize communion wafers aren't the tastiest things in the world, but they are just stale crackers. Nope, the only way I could see this happening would be if you bit your tongue or lip while taking communion, how that would happen I can't imagine. Now, if you were having some sort of mental reservations about communion that upset you to the point you felt the urge to spit I would suggest some prayerful reflection on the the whole Eucharist thing. My wife still has trouble with "this is my blood, this is my body" so she chooses not to take communion. This doesn't make her a bad person or any less a good Christian, she just can't get past the mental image. I have several Hindi friends that find the concept grotesque as well. Several of my Baptist/fundamentalist friends think the Catholic Eucharist misses the point and commune with Jesus at every meal. "Whenever food or drink passes their lips," as they're so fond of saying, and they may have something there. To each his own.