I would like to propose that zombie walking be brought back to Spiral Knights for Halloween, It'd be not only a great throwback but a fun way to show post release players something they missed out on. It could be done by just removing the sleeping z's and enabling the walking function again. I for one would love to see hundreds of Spiral Knights meandering about in their zombie shuffle donning skelly outfits. A fun yet relatively easy to implement change for a holiday? I hope that you can at least contemplate this OOO it'd be so much fun.
As for the other suggestion the other glitch that had allowed players to slide along their bottoms and "butt cart race" around haven could be reimplemented with a textural change and allow for a racing mini-game. Not only would it be a crownsink but it would broaden the number of activities to keep players occupied when their mist runs out. I'm not sure how much work would have to go into the design of a racing cart but it'd be a small model change to the sitting animation and then whatever model overlay. Think something along the lines of the slot car racing in Mario Party games. Nothing with a design change as big as creating attacks or item use against your fellow knight but road hazards or just a fun straight racing game. It would be an entertaining addition and probably allow new costume items with a racing theme to be implemented. A real two birds with one stone.
I teally like the idea of the skelly shuffle. It was always so funny to see a collection of dozing knights wander off and mob someone.
Just the mention of butt-carting is a win.