Yes, I have had the same thought, both the engine and exhaust pipes will have a lot of residual heat left in them for quite some time after the car is parked and if someone stands a little too close they will surely get burnt, apart from the pain and danger of infection, I do wonder about liability in this day and age!
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Paul.
Black & Tan M3W, Caterham CSR, Mini Cooper D Clubman, Macgregor 26M, Powabyke.