Yesterday there was some news coverage of the 2002 incident at a Virginia law school in which a shooter was stopped by three or four students, at least two of whom had retrieved handguns from their vehicles in the parking lot.
The perp surrendured to them once he realized they were armed, but unfortunately he’d already killed two or three people.
That was back in the early 60's, mind you, when Austin and UT were still populated by real Texans.