Speed of Light Questions

• Can you go fast enough to get enough mass to become a black hole?
• Can you make a shock wave of light by breaking the light barrier just like supersonic airplanes break the sound barrier?
• How do space ships fly faster than light?
• How does a photon accelerate to light speed so quickly?
• How does looking at distant galaxies allow us to look back in time?
• Light has no mass so it also has no energy according to Einstein, but how can sunlight warm the earth without energy?
• What is the speed of dark?
• What is the speed of gravity?
• What would happen if you drove your car close to the speed of light and turned on the headlights?
• When I bump one end of a long metal bar, the other end instantaneously moves. Can I use this to send messages faster than light?
• Why does my room get dark when I turn the lights off even if my window is shut?
• Why is light pure energy?
• Why is the speed of light a random finite number?