I applied for early admission to UNM. I applied fairly late (I don't remember if there was an explicit deadline, but if so I was before it) and hadn't heard back by the first day of my senior year of high school. I called the admissions office at lunch from the high school, and they said, "Sorry to have not gotten back to you in time. You've got good letters of recommendation and you already have six credit hours at UNM with a 4.0 GPA. We're going to admit you."

I told people at the high school goodbye, left before the end of the day, and never went back to that fucking place.

That's how I did it. Your mileage may vary.