Those drills are actually lame compared to some of drills back in the day. I'd like to see their faces after completing a full "Lightening Drill"
Some people here may be familiar with it. Basically it starts from the end zone accelerate to the blue line and back accelerate to the red line and back accelerate to the far blue line and back and then accelerate to the far end zone and back. There is also a lite version where you only come back to your own blue line after the far blue line and the far blue line from the far end zone. Lot's of fun.