Heh...when my littlest brother was little, we could always tell if he wasn’t being entirely truthful because he’d walk his index and middle fingers across whatever flat surface happened to be nearby.
In the years I’ve been doing helpdesk type work, very often when I ask questions like “did anything get changed recently?” I can just *see* those walking fingers in my mind’s eye as they’re answering....
Dad: Luke, did you do this? or Luke, what happened?
Luke: I don’t remember.
Yep, he’s lying.