Body Squats, Adapted back extensions

For time:
150 Squats
  75 Adapted back Extentions
120 Squats - did 10 extra
  60 Adapted back Extensions
  90 Squats
  45 Adapted back extensions
Total reps -
360 - Squats
180 - Extensions

Splits for each exercise
150 Squats - 5:00
  75 B.E. - 2:54
120 Squats - 6:21 did 10 extra
  60 G.E. - 2:07
  90 Squats - 3:33
  45 B.E. - 1:20
Total time - 21:18

Quads were absolutely on fire.  Extensions were like Supermans.  Used white roller under hips to allow more movement.
Not exactly sure what I have done other than moving the huge rocks the other day.  My back is on fire.  The only time it has not really hurt in the last few days was during the workout tonight.