Gas-powered cars will soon be replaced by electric cars, which will be replaced by two-person motorcycles powered by nightmares. Catch some combustion-engine action while you can with today's Groupon: for $16, you get a general-admission family pass for two adults and two children 8 years old and older or one adult and three children to stock-car races at Humberstone Speedway in Port Colborne (a $35 value). Admission for children aged 7 and younger is free.

Humberstone Speedway hosts a summer’s worth of automotive extravaganzas, from stock-car races to hot-rod shows. The family pass grants access to any general-admission event as well as one hot dog, one pop, and one wearable mud flap per person. The season unleashes action almost every weekend through Sunday, September 25 with a multiplicity of stock-car races intermingled with minivan demolitions, school-bus races, and fireworks. Though valid for general-admission events, the value of today's Groupon may also be applied toward 358 modified stock-car races ($37), special events ($45), and the All Canadian Championships on Sunday, July 31 ($50). Check the online schedule for event details.