NASCAR driver Jason Leffler, 37, died after an accident during a dirt car event in Bridgeport, N.J., on Wednesday. Known by the nickname "LefTurn," Leffler is survived by 5-year-old son Charlie Dean. His son, in particular, was on the minds of the drivers who knew Leffler as they heard the news. They reviewed images on his Instagram account and shared memories. Here are a few of their tweets reflecting on the man they knew and the high cost of racing. Please share your memories of Leffler in the comments below.

The loss left many drivers reflecting on the danger in this sport that they love.

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