perhaps worthy of note is that , due to relativity , a few seconds on my clock or a few inches on my ruler would not correlate to the same amount of seconds or inches for the humans in the extraction vessel , and so it was a bit complicated to compute the tensions that would be applied to the drop cable ; in fact , due to this and several other factors , the drop cable that we were using was so difficult to design that it was probably far more an advanced piece of technology than anything your grandchildren could ever hope to see .