The quora source of that has more on the list: https://www.quora.com/What-can-an-Indian-do-that-most-people-cant Anyhow... I went and checked whether people do indeed crush a coconut under a new car tire. It seemed like a risky thing to do. Coconut shell pieces can pierce through and cause a puncture. Most often lime/lemon is used in the "chasme baddoor" ceremony for new things.