Gas

Colby was running at top speed from the front of the house to the back. As he passed by in a blur, he said the following...
Colby: "Mom, I feel the gas!"
Mom: "uhhhhhh......"
Colby: "You know! The gas on my face!"
Mom: "Oh! You mean the air rushing by, since you're going so fast?"
Colby: "Yes. Air is a gas."
I was afraid he was being "jet propelled" by a different kind of gas, so this explanation was a relief to me.

Then Quinn chimed in.
Quinn: "Oil is used in cars. And robots. And squeaky doors. And in some kinds of gas."
Mom: "Yes."
Quinn: "And we eat some kinds of oil. It's in pizza"
Mom: "We don't eat car oil."
Quinn: "Yeah, I know."

Apparently, there was a science lesson at school that had something to do with the states of matter, and oil. These things pop up at the most random times. But they're listening!! Encouraging.