Cluster of pain

Not to long ago, we did the wod named "Squat cluster". Today, we did "Deadlift cluster". All I know is they are clusters of pain.

WOD: 25 dead lifts (245 lbs) - 30 seconds rest between sets. You can break up the 25 reps however you want, but you can only rest 30 seconds before picking up the bar again. If you wait longer, you have to do 5 burpees.