People forget sometimes how big these things are, myself included. Stadiums and arenas throw your sense of scale off.
By the way, for comparison, the UT Tower is 307 feet tall, and the tower shaft is 59x59 feet. Basically a 150x50 foot jumbotron would be as wide as the tower shaft itself, and as tall as the "1" on the side of the UT Tower as the "1" is lit using 11 floors in the building.
