Found a Halloween version of Nucleus. It's in A2 and I don't normally go after maps in Alpha, but I think we can make an exception here. LINK: https://tf2maps.net/downloads/circus-nucleus-event.10434/
This was a fun map to test out. There's a ramp on either side on the second floor of the map that will launch you so you can try to grab the huge health above the cap in the middle of a huge spinning ring. If you fall down the hole around the cap point, you have a chance of bouncing back up thanks to bongo drums circling around under the cap. If you miss, well....you get eaten.
