Why, Why, Why, does he DO that?

My son just called. I could tell the moment he said "hi Mom" that there was a problem.

Me: "What's the matter pal?"

CAL: "I threw up on the plane"

Me: "Did you throw up in a bag?"

CAL: "No"

Me: "Where did you throw up?"

CAL: "All over me, and now Dad is really mad at me."

Knowing full well why is dad was mad....

Me: "Why? Because you just sat there and didn't say a word"

CAL: "Yep"

The kid drives me CRAZY. He will NOT say anything when he throws up. He will just sit there and make no attempt to move. He just throws up. I have no idea why he does this. I have told him a million (no exaggeration) that he has to get to a bathroom, or find a bucket, trash can, or anything that he can throw up in. He cannot just sit there and throw up. He is 10. He is not getting it. I don't understand. Can someone explain it to me? You might remember me ranting and raving about the time he threw up on the living room floor because he thought he saw a mouse turd. That is only one out of hundreds of times. He has allergies and has a lot of nose drainage. He gags a lot and when he gags he tends to throw up.

I feel sorry for my husband and everyone on that plane because he had McDonald's before he left Manchester.