Go on ThemTube...

You just have to find actual facts. Such as:

Gravity differs from point to point on the earth's surface.
Testable, measurable.
Why? When a mountain is nothing compared to the size of the earth (as ball, as stated)

A capacitor charged to a million volts loses weight.
Charged to ten million, it floats.

Iron loses magnetism long before it turns molten. (molten core of iron is the cause of magnetic field)

The speed of light changes. As measured.

The speed of light can be exceeded. Benchtop experiment, where a force is produced from end to end before light could get there.

During the time of Einstein, a guy did the M-M experiment but at differing altitudes and found he got different measurements. Einstein blew him off as it was temperature that was at fault.

Physicist today cannot duplicate the feats that Tesla did to impress Newspaper reporters.

Light... supposedly a particle, enters a piece of glass and slows down, and then, upon leaving the glass, speeds back up. (a 9mm bullet enters the body, blowing out the lungs, and then continues at the same velocity :-p )