I put my left thumb and right thumb together and slid it away, it was a practical joke that any Japanese would know.
I've heard that some foreigners get surprised if you show this to them.
But when I lightly showed it to Mercè-san she stepped back and fell down on her butt.
She looks very scared.
"You look surprised Mercè-san! See, I only put my left and right thumbs together and slid them off like this."
"......I knew that from the start, you know. It's just that much. I only got surprised because Lute did something strange all of a shudden."