Bedtime reading goes "boink"

Spark is a very good reader, he just doesn't find much pleasure in it. Because of this, whenever he does read we let him even if it is at night after bedtime. Calvin and Hobbes comic books (his book of choice here) he reads over and over and colors in the strips. He also sleeps downstairs on the couch most nights in his self declared man-cave. Our shower is also downstairs. The Dad was going down for a shower and saw that Spark was reading in this position. By just glancing at Spark while quickly walking through, he just assumed that Spark was awake. He came out of the shower and through the family room and saw that Spark was still in this position. Upon further inspection it became obvious that Spark had 'fallen asleep at the book'.