Huh, ok. I already have some vague ideas in my head. I'm not any closer to solving the riddle, and I really don't remember previous episodes well enough to explain the 'how dunnit it' but I've got some principal suspects.
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"It's a magical world, Hobbes ol' buddy...let's go exploring!" - Calvin
http://img.imgcake.com/calvinfinalpngpy.png