Ope, suddenly I remembered I love driving the speed limit.

Eh, it’s for emphasis, it’s just a style that gives a visual along with the words that indicate a specific physical movement that some people interpret in a specific way and changes how they are communicating, thus changing the message in a minute way. It’s not hurting you, if it’s enough to make you want to disregard what they are saying that seems pretty petty of you. Just because people communicate differently from you isn’t enough of a reason to disrespect them or what they have up say. Now, if they’re saying something abhorrent, that’s a different story, but you’re not an idiot, just judgemental