I learned this from President Obama...

For the downvoters, he's referring to this instance when (then) Senator Obama jokingly referenced bubble sort during this Google event: https://www.youtube.com/watch?v=koMpGeZpu4Q

It was one of the many viral moments during Obama's original campaign where he seemed cool and in touch.

	▲	yunnpp 20 hours ago \| parent \| next [-]
		Of course, being able to call out a sorting algorithm is the kind of thing that makes you very "cool and in touch" in the grander scheme of things, unlike, say, playing sports or lifting 500lbs.
	▲	meindnoch 12 hours ago \| parent \| prev [-]
		It was also when Google seemed cool and in touch.