It's pretty strained but far from the weirdest cyclic systems.
There are some cycloallenes with two sequential double bonds,
https://pubs.rsc.org/en/content/articlelanding/2015/qo/c5qo0...
You can also get triple bonds in a large enough ring
https://en.m.wikipedia.org/wiki/Cycloalkyne
It's pretty strained but far from the weirdest cyclic systems.
There are some cycloallenes with two sequential double bonds,
https://pubs.rsc.org/en/content/articlelanding/2015/qo/c5qo0...
You can also get triple bonds in a large enough ring
https://en.m.wikipedia.org/wiki/Cycloalkyne