Refs completely botched what looked like a pretty clear safety

How do you miss something this clear?!

During Iowa's beatdown of Purdue, it looks like refs gave the Boilermakers a little bit of a break, already down 35-7 toward the end of the first half.

Two Purdue kick returners ran into each other trying to field the kick on around the one-yard line, only to backtrack into the end zone and down the ball for a pretty clear safety.

Only officials originally called a touchback before calling the ball down on the half-yard line.

Both calls appeared to be quite incorrect.