"You don't know squat"

Warm
800m run
Partner Stretch

Skill
Front/Overhead/Back Squat

WOD
Squat ladder… (65#)
1x Squat the 1st minute… 2x Squats the 2nd…3x the 3rd
Minutes 1-9 overhead 10-19 front 20-??? are back squat

This was a weird WOD. By round 8 or 9 it became pretty hard. I made it to round 20, although I was using terrible front squat form to just try and keep going. I switched to air squats for the last 4 rounds and it was cutoff at 25mins.