Yesterday I was running my players through the first test of the Smoking Eye--the test of Judgment at the blinking in and out of Celestia cathedral.
They went down the stairs to find the mummy lord behind his desk. I read out the narrative portion of his statement. I tried to do a raspy, undead type narrative voice.
My players wouldn't stop laughing for about 5 minutes and asked me to repeat the narrative a few times, just for extra giggles.
"What the hell is so funny?" I asked.
"How can he say bebilith like that if he doesn't have a tongue?"
Lesson--don't try to do voices. Go read that narrative block and try to do it with what you think a mummy lord would sound like...it is pretty darn funny.
I feel your pain man. When I DM I'm notorious for voices and various sound effects to the endless amusement of our group. But I think it makes the game a little more colorful (no matter how bad my interpretation of a Slime dropping off a ceiling or an old rusty door might be)