So, your in a plane...

[crash-proof]

It's all relative.

That's what they say about W. Virginia and Alabama.​

 

[spudskier]

Digging into my physics knowledge from AP phys in high school, when approaching the speed of light (if able) you yourself would begin to turn into light, therefore you wouldn't be able to shine the flashlight (which is also becomming light) in the first place... even inside the aircraft, everything would be changing.

Thank you Einstein (google it)