Incorrect Enforcement?

[wvref1]

Did not see the play in question but recently heard that a possible explanation was that the kick was blocked, was still behind the LOS when someone had the dreaded IW. A friend of mine saw it on TV and said that there was no yardage markoff, just a replay of the down. The IW scenario explains this better than an USC. The excessive celebration call was probably coming from one of the talking heads trying to figure out what was going on. Or if they actually did mark off half the distance (again I didn't see it) the IW would explain replaying the down, because the USC sure doesn't explain it.