It was all I could do to keep quiet.
This young fella sitting beside me started snickering and pointing at an older gentleman who was walking by.
The lips of the old man (who by the way, was about my age) were moving, but he wasn’t saying anything.
I didn’t see anything strange about his behavior at all. It looked perfectly normal to me.
Bless Pete, I used to do it all the time when I was growing up.
Evidently, this young upstart is not attune to the wonderful world of invisible friends.