How about feeling idle with nothing to do but consider your own mortality? Not many people enjoy that, and Pascal wrote an interesting paper about it:

http://stmaryvalleybloom.org/pascal-diversion.html

Personally, my main takeaway can be summarized by this passage:

>And those who philosophise on the matter, and who think men unreasonable for spending a whole day in chasing a hare which they would not have bought, scarce know our nature. The hare in itself would not screen us from the sight of death and calamities; but the chase, which turns away our attention from these, does screen us.