Well I had a quick search and couldn't find anything.
Well I found this out when I was messing around. I double clicked a chair and I DC'd. Logged back in and did the same thing. Clicking the chair once I just sat down but if I clicked again before I sat down and the marker went away the server would crash. I was having fun crashing a server loads with different chairs around the map with this.
Clear things up:
- When you hover your mouse over a chair it comes up with the circle clog thing.
- Press it once and you sit down normally, but if you press it and then while moving press it again quickly before you actually sit down (not easy with good internet) then the server crashes!
- I just run and spam right click on it.
Note: This only appears to crash server if you click it enough times, otherwise only you gets DC or the map.
I tested this on a aspire hearthstone core, near latest, not sure the exact one.
Have fun crashing the server!