Former Formula 1 World Champion Jody Scheckter told Britain's BBC he wants his son Tomas to quit IndyCar racing following the death of Dan Wheldon.
Scheckter was a spectator at Sunday's Las Vegas Indy 300 and had an anxious wait before discovering son Tomas had escaped unharmed from the 15-car crash.
"I've wanted him to give up for a while," said the elder Scheckter, who won the world title with Ferrari in 1979 and retired the following year. Hopefully this will knock some sense into him and make him realize there is more to life. It really isn't worth it."
Asked whether the sport was safe, Scheckter told BBC Radio Berkshire: "No. It is the most dangerous form of motor racing at the moment. I think the setup they put in so it can be more of a spectacle makes it very, very dangerous on circuits like this. Some others [tracks] aren't as bad."
Scheckter, 61, claimed the crash was "inevitable" due to the changes designed at making IndyCar more competitive.