This is a dated comic strip [probably from sometime before the 1960’s] that I feel does a good job in explaining the effects of relativity
Readers should note that the cartoon was produced before the discovery of the lighting effects that occur near to the speed of light.
Quote:
“When Albert Einstein advanced his special theory of relativity in 1905, he turned upside down everything that common sense and science had established about time. He said that time is not absolute, but is a relative quantity that could show one value to one observer while seeming different to a second viewer. The whole thing seemed preposterous.”
References:
http://kvpy2005.blogspot.com.au/2006/09/great-relativity-bomb-plot.html
http://www.willemsplanet.com/2015/05/09/friday-the-relativity-express/
It is against this background that I recommend that you read the attached pdf file: