Use jack stands for your car. If your body will be under the car for even a second, there should be jack stands. There were five different people at my high school who were in a wheel chair because they thought the jack was enough.
I don’t care if your jack costs $100,000 made of pure titanium; do not trust it.
That had to be a HUGE wheelchair
Similar to this, once you have a vehicle on jack stands, shake it lightly to make sure it doesn’t fall easily. Better to find out now by shaking the car before being under it.
Related pro tip, if you’re changing a flat tire and don’t have any jack stands, place the spare/damaged wheel under the car while you’re working on it. Better to have the car fall on the wheel then potentially your leg
Why would you be under a vehicle to change a flat? You just sitting at the wheel legs under the car?
I do this anytime I take a wheel off, even with jack stands. Doesn’t hurt anything and I’ll take anything extra between the chassis and my head I can get.
Loosen (but do not remove) lug nuts from a wheel, before jacking up the car.
How would failing to do this kill you?
I prefer to jack the car until the wheel is barely touching, then loosen the nuts while the wheel still doesn’t rotate, then jack it all the way up. Have I been risking my life somehow?
If the nuts are too tight you risk rocking the car off the jack when you undo them.
The least you’ll do is possibly damage your cars bodywork the worst is to injure yourself.
