That was one ugly ass half of basketball. Very aggressive D, but the refs are not calling a clean game. Houston has less fouls called on them, but the eye test says they should have more. One play sticks out to me when the Houston player landed on the Iowa players back and there was absolutely no call.
As already pointed out, I don't think the refs in the NCAA tournament would allow either team to play this type of defense without calling a bucket load of fouls on them. I don't mind a physical game, but obvious Houston fouls aren't being called while a few of Iowa's fouls seemed sketchy at best.
Last observation, has either team ever heard of a back cut? Iowa, needs to spread the floor, do some more inside out and be more patient. Oh, and hope the refs don't continue to hose them thus second half.