The final level of keyboard smashing. You did all of the letter combinations then you did all caps as well then you did all of that backward. Its so long that Urban Dictionary doesn't let you add the last `. I don't think there is anything further than this unless you add spaces.
`1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik,9ol.0p;/-'=\~!QAZ@WSX#EDC$RFV%TGB^YHN&UJM*IK<(OL>)P:?_{"+}||}+"{_?:P)>LO(<KI*MJU&NHY^BGT%VFR$CDE#XSW@ZAQ!~\='-/;p0.lo9,ki8mju7nhy6bgt5vfr4cde3xsw2zaq1` is my favoritething to manually type when I'm bored.