\ - Backslash
\\ - Real backslash
\\\ - Real real backslash
\\\\ - Actual backslash, for real this time
\\\\\ - Elder backslash
\\\\\\ - Backslash which escapes the screen and enters your brain
\\\\\\\ - Backslash so real it transcends time and space
\\\\\\\\ - Backslash to end all other text
\\\\\\\\\\\... - The true name of Ba'al, the soul-eater 

{{Title text: I searched my .bash_history for the line with the highest ratio of special characters to regular alphanumeric characters, and the winner was: cat out.txt | grep -o "\[[(].*\[])][^)]]*$" ... I have no memory of this and no idea what I was trying to do, but I sure hope it worked.}}