Ever wonder what the 'green dot' is on an NFL helmet?
The marking signifies that the player has a speaker inside his headwear.
Dont'a Hightower discussed what it's like to wear the 'green dot' on the field.
"It's helpful and annoying at the same time," said Hightower. "You know how you feel like you have a conscience in the back of your mind when you're doing something wrong that you shouldn't be doing? That's exactly what it's like."