It was a kind of mini-Shaq move--indefensible against smaller defenders, but utterly ridiculous when Jackson was matched up with a guy who had an ounce of size and/or athleticism. Didn't the Knicks do something like put Camby on Jackson in that series?
Seriously though, he was a decent PG, just not in that series. I would take half of a Mark Jackson over a whole Jamaal Tinsley.