How Are Sick Kids Supposed to Behave?

Luckily in my 4.5 years of being a mother our kids haven't been sick much.  So today I'm pondering this question:  Why do my sick kids run around in between throwing up?  This is the oddest thing I've ever seen.  Christian throws up all over the table and just asks why that happened.  Then he's off - running - playing - laughing!  Aren't sick kids supposed to lie around quietly all day?  I wish someone would deliver laundry detergent to my house.  I'm almost out with the massive amount of laundry I've done in the last 16 hours.  It's almost naptime. . .  I think I'm going to soak in a hot bath.