GHD situps & back extensions

For time, do 5 rounds of:
30 GHD situps
25 back extensions

I knew I couldn't get thru the sets unbroken, so I decided to work my burpees in to this WOD. Every time I stopped, either to change from situps to back extensions or because I needed a break, I did 6 burpees. I figured that would be a total of 15 breaks...I was close. I actually to 18 breaks and ended up doing 108 burpees.

Time - 31:04 (stopped the watch for 30-45 seconds to help a guy adjust the seat on the leg press machine).

Workout totals - 150 GHD situps, 125 back extensions, 108 burpees

100 Day Challenge - YTD burpees 4224