[Goose]

I guess they must have either executed the perfect gameplan (something they haven't been able to do against anyone else, really) or WSU just threw up all over themselves.

Actually, I think it was a bit of both. Kal had a very good scheme on defense. The rushed Falk hard and played zone. WSU's OL played poorly, and the rush got there quick. When Falk dumped it off, Kal tackled the receivers for short gains.  Normally, that won't work, because either Falk gets enough time to throw medium patterns to soft spots in the zone or somebody misses a tackle. It worked Friday because the WSU OL didn't block anybody and Kal didn't miss many open-field tackles.
On defense, WSU has been doing it with mirrors all season. They compensate for lack of size on the DL by shifting before the snap and often by slanting their rush. Kal basically ran away (opposite side) from the slant most of the night. That was possible partly because WSU seemed to always slant to the strong offensive side against certain formations. Kal killed them with weak-side runs. WSU eventually tried keeping one player wide to the weak side, but that player was usually too wide and got blocked by a receiver or the back  would run through the natural hole created by the rest of the WSU line slanting. Against balanced formations where WSU seemed to always play "straight up", Kal was blowing up the center of the defense. The WSU DL was just too small to hold their own that night. Kal's big back would get 10 yards a crack it seemed.
It wasn't that Kal was playing lights out. It was that they had a simple plan on offense that they executed well against a WSU defense that didn't adapt and a simple plan on defense against a WSU OL that wasn't blocking. WSU didn't adapt/improve, so Kal just kept doing it. End of story.

[Goose]

I guess they must have either executed the perfect gameplan (something they haven't been able to do against anyone else, really) or WSU just threw up all over themselves.

Actually, I think it was a bit of both. Kal had a very good scheme on defense. The rushed Falk hard and played zone. WSU's OL played poorly, and the rush got there quick. When Falk dumped it off, Kal tackled the receivers for short gains.  Normally, that won't work, because either Falk gets enough time to throw medium patterns to soft spots in the zone or somebody misses a tackle. It worked Friday because the WSU OL didn't block anybody and Kal didn't miss many open-field tackles.
On defense, WSU has been doing it with mirrors all season. They compensate for lack of size on the DL by shifting before the snap and often by slanting their rush. Kal basically ran away (opposite side) from the slant most of the night. That was possible partly because WSU seemed to always slant to the strong offensive side against certain formations. Kal killed them with weak-side runs. WSU eventually tried keeping one player wide to the weak side, but that player was usually too wide and got blocked by a receiver or the back  would run through the natural hole created by the rest of the WSU line slanting. Against balanced formations where WSU seemed to always play "straight up", Kal was blowing up the center of the defense. The WSU DL was just too small to hold their own that night. Kal's big back would get 10 yards a crack it seemed.
It wasn't that Kal was playing lights out. It was that they had a simple plan on offense that they executed well against a WSU defense that didn't adapt and a simple plan on defense against a WSU OL that wasn't blocking. WSU didn't adapt/improve, so Kal just kept doing it. End of story.