Religious joke

A Sunday School class of about ten kids is being run. The teacher asks, "What body part do you think goes to Heaven first?"

Little Susie says, "Your head goes in first, because you float up."

Little Janie says, "No. Your hands go in first because you're praying."

Little Johnny says, "You're both wrong. You go in feet-first." The teacher is perplexed. "Why feet first, Johnny?"

Johnny says, "Last night, I went into Mommy and Daddy's bedroom and Mommy's feet were in the air, and she said, 'Oh God, I'm coming!'"