"Before doors, how did people go outside?" Inuyasha asked.
"Easy," Koga replied casually as he ate a slice of cheese pizza with extra cheese. "They ran through walls."
Sesshomaru wondered briefly if he should say something before Inuyasha tried anything... but then decided against it. It would be too damn funny to see Inuyasha knock himself out without Sesshomaru himself having to lift a finger. He watched silently as Inuyasha ran into the wall again... and again... and again... and again... Until he finally sprawled at his father's feet as Toga walked in the room.
Toga raised an eyebrow at the two boys sitting on the couch before saying casually, "So... It looks like I missed the show."