I don't know about 21-28 more points ... but the Hawks did get 2 red-zone INTs and the Hawks stymied them on a 4th down conversion near the red-zone. Thus, I could understand if Hoosier fans thought that they were close to getting around 14 to 17 more points.
Of course, the Hawks played to keep things even more in front of them in the 4th quarter to force Indiana to bleed the clock ... so if the Hawks remained more aggressive on D ... and didn't run it as much in the 4th quarter ... the Hawks could have easily scored more points too.
Also, the Hawks had some foolish mistakes too ... after all, uncharacteristically, the Hawks had around 100 yards in penalties! The Hawks had a promising drive in IU territory that got stalled by an illegal block penalty .... before the Hawks knew it ... instead of a sure-scoring drive like it appeared to be ... the Hawks were on their own side of the field facing a 1st and 40!