This bug is sort of simple, but definitely easily exploitable. The ability to shoot and be un-stunable! (And un-moveable!)
Steps to reproduce:
1. This requires 2 players (or ckey switching if your an admin/mod)
2. Cuff player 1 and buckle to a chair next to a table (or barricade of tables!)
3. Player 1 can now climb onto any and all tables nearby!
4. ....
5. Exploit!
Exploit:
Some possible exploits for it would be running a long line of tables down a hall.
Removing the cuffs seems to keep you tethered to the chair, so if you were to pull a gun out, you would be an un-stunable gun-wielding monster of a marine. (until you got your face clawed off by all the angry xenos'!)
This bug also can be done without the use of cuffs, or a second player! So you can actually be fully equipped and run up to a chair and cuff and climb. (This was tested the round after I wrote the first bit)
Evidence:
► Show Spoiler