Yes.
Depending on the quality of the trampoline. Some of the cheaper trampolines use PVC for their pads and they crack easily in the winter. An excessive amount amount of snow, espescially wet snow may also stretch the springs. Be sure to clear off snow if you notice the mat sagging. Also do NOT use a snow shovel to do this as it may damage the mat. Using a broom usually works..
No, all it does is make it slippery.
destroy or ruin
If the water balance is correct then no it will be fine, but in my experience it's generally not so I'd advise to remove it, dry and fold, and store out of direct sunlight.
Not unless you really abused them.
antifreeze does two things. It keeps the water in the radiator from freezing in the winter, and helps prevent if from boiling over and evaporating in the summer. You can run your vehicle with water alone in moderate temperatures and it will do the job. But, if you mean by "running out of antifreeze" you mean there is no liquid in the radiator, then yes, your vehicle can overheat and ruin the engine.
Destroy, ruin, demolish, take down, or wreck. Those are opposites of build.
Because he said that it would ruin the picture.
It won't ruin your workout if you lean forward, but will stretch other muscles.
Yes.
It can over time, it is not meant to be a lubricant.
Maybe....
Over 9000!