Calvin and Hobbes by Bill Watterson for March 17, 1991
Calvin: Nyup nchyup. I think a burp died trying to get out of my mouth. I'm thirsty. Monster eyes! Help help! It's after me! It's got me! I can feel its terrible fangs!! Dad: Sleepwalking again! Mom: Let's go back to bed, honey. You had a nightmare. Calvin: Oh, it was you! It sure is creepy having a friend whose eyes glow in the dark. Hobbes: It's so we can see people who might be sneaking out of bed to fix a snack without making arrangements to share.