A scary moment during the beginning of NASCAR Xfinity Series practice at Chicago. Alon Day wrecked into Justin Allgaier under caution. Day, who is racing in his first NASCAR national series event since 2016, was going full speed under caution. There was a communication issue between Alon Day and his spotters. Justin Allgaier had been wrecked into a tire barrier for 21 seconds. Day came speeding by and slammed into the rear of Allgaier. Day shredded his driver’s side bodywork off his car. Allgaier drove to pit road, Day had to be towed. Here is the wreck from Allgaier and then Day comes speedin…