Ever wonder how much G force goes into a routine football tackle?

To give you some perspective:

• 1 G = Gravity
• 6 G = Roller coaster
• 30 G = Minor rear-end auto collision
• 100 G = Head impact in crash that killed Princess Diana
• 300 G = Fall from a height of 35 feet

Researchers from Purdue University’s Neurotrauma Group have spent the last four years collecting G force data from the helmets of high school football players.