There was a customer at work who was scaring me so much. She just kept talking really, really fast like this:

Yeah, yeah. You guys have so much stuff.
Yeah, you just keep putting it all out.
There is just so much stuff, yeah yeah.

And she wouldn't stop so I was like yeah, yeah and walked away. I feel like her eyes were shifting back and forth too at the same fast speed but this is probably my imagination.