You ever have one of those moments where you're talking about something and you realize that your point gets lost in translation? And you fight and fight to find some words of redemption for your brilliant thoughts but the more you jabber the less sense it seams to make. So you settle for making some terribly unsure face...
...and promptly spurt out: "sorry-that-probably-made-no-sense-awkward laughter-I'm-really-bad-at-explaining-things-sorry-pathetic pseudo-shrug-so-anyway-I'm-done-now". [Alternate deflection of attention metohd: slowly trail voice out while looking around for anyone else to make the slightest move to save your from drowning in your own incoherence].
Happens to me about once a day.