Oh well, a little fiddling since it's such fun stuff:

   # Last line of a file
   perl -pe '$*=$_}{$_=$*' file
[download]

->   perl -pe '$\=$_}{' file

Which leads me to a head-tail (useful eg, for finding out the range of a log file).

   perl -pe '$*||=$_; $\=$_}{$_=$*' file
[download]

and (not stopping while he's ahead) . . .

   # Exit after first match
   perl -ne 'print; last if /foo/' file
[download]

->   perl -pe '/foo/...last' file

  p