The Flex offense is an offensive strategy in basketball developed in the 1970s. It is a patterned offense relying on cuts across the key (called a "flex cut") and down screens to create a "pick-the-picker" action. This offense if most effective against a man-to-man defense, though some ambitious coaches have used it against odd front zones. It is the favored offense of many high school programs because it requires players to be in constant motion and the patterns of screens and cuts are easy to remember. Though dismissed by many coaches at the college level for its predictability, some notable programs still rely on it. It is currently run by some NCAA teams, perhaps most famously by Gary Williams of the University of Maryland. Gordie James of Willamette University used the flex offense to lead the Bearcats to the 1993 NAIA Division II National Championship.

The flex is a type of motion offense, similar to (and in fact derived from) the earlier shuffle offense.

The basic theory behind the flex offense is that all players are interchangeable, that is nobody has a specific role. The point guard advances the ball up the court to start the offense, while other players set screens to create openings. Typically, the point guard sets the offense on the same side as a low-post player positioned at the right block. The point guard passes opposite to a high-post at the top of the key while a wing player cuts off a screen by the low post player towards the ball to receive a pass from the high post player. The point guard screens down to the low post player who moves to the top of the key to receive a pass from the high post player. The same cut occurs on the other side of the ball and the offense begins its continuous cycle.

He still sucks though.

I'm pretty sure the UT win in Knoxville was the game that featured an intentionally-missed-free-throw-and-put-back winner by Alan Houston.

And further research finds it was:

The final play deserves special mention. UK appeared to almost intentionally foul Houston with about 5-6 seconds remaining, since they knew UT needed 3 points. Kentucky was ahead by 3 at this point of the game. Houston hit his first, but deliberately missed to second to allow for a UT recovery and tap-in to tie it. Everyone in the gym knew this was going to occur, but still the UK players did not block out properly, and after a couple of taps by both sides, UT's Corey Allen ended up getting the ball and making a nice shot, during which he was fouled ... He hit his free throw with 1.5 seconds remaining to give UT a 1 point lead.

Now that was a game. Unlike today.