Dead Man Burpees
This is a normal burpee with a squat jump, except when you hit the pushup position, you need to flatten yourself to the ground and lift your arms and legs up before proceeding back to pushup position and beyond.
Try and go the entire four minutes without breaking form.
Some humor, because burpees and treadmills can be evil:
Question: Are you an exception to the "no one" rule above? 'Cuz honestly, I kind of like burpees.