What’s an awkward social faux pas that isnt full scale embarrassment, but enough to feel “urgh”?

Both a stranger and I were waiting for coffee at the end of the bar of a well-known coffee shop, and both yawned simultaneously and made eye contact. So we smiled at each other, mid yawn. Weird.

Or that thing when you try and let a car through whilst they try and let you through, and the stop start goes on too long.

That kind of thing?