Just. Wow. This has piqued my interest, is there any background information as to why this happened (so often)? There must have been underlying tentions, wondering what those were, but can imagine it's just lost to history
Oxford scholars were literally above the law, and used their protected status to abuse and demean the townspeople, up to and including the mayor.
After the riot, the king cracked down and reasserted the arrangement, which apparently continued in some forms for another 500 years.