User blog comment:Coollittlepeashooter/TCLP's Level Making Tutorial - About 90s and 91s/@comment-27983885-20170227175229/@comment-27744487-20170227175356

I have to disagree, 90s are used for shortcuts. The fact that they are always used as at the end of something is true. But, their real purpose is to work with 91 bytes.