Unsynchronized Audio and Video
Don't you hate it when you're watching something and the audio and video are unsynchronized? It is said that any unsynchronization by as much as 80ms is detectable by the human brain. Imagine watching a movie that way!
Kevin MacLeod (incompetech.com) Licensed under Creative Commons "Attribution 3.0" http://creativecommons.org/licenses/by/3.0/