kevin guskiewicz is not.e recipient of a mcarthur genius grant to study head injuries. >> i'm going to ask when you leave this field that you never again use the word "ding" or "bell ringer." if you hear anyone say that, you say, you mean brain injury? >> he travels the country educating everyone from the nfl to local high school players, parents and coaches on how to prevent head injuries. so it's helmets impacts telemetry? >> yes. it's collecting the data and all communicated through this receiver here. this would be set up on the sideline. >> let's try this. and i'm going to give it a moderate hit here and see what happens. so. >> so, yep, it's recorded up here at 23.6 gs of acceleration. >> he showed me how hard these hits really are. >> he's going to withstand an impact of 157 gs. >> oh, wow. >> what we see is impacts to the crown of the head are over three times more likely to result in an impact greater than 80 gs. >> wow. and, again, that's similar to a car accident. >> right. the question becomes, ho