If the player walks into the bathroom, there's an 80% chance of hearing SCP-789-J saying: 'I WILL EAT YOUR BUTT.'
However, during and as of an unspecified update, the command ceased to work. If you type in 'halloween' into the Console command box, SCP-173's face will turn into a jack-o-lantern. In-game easter eggs Halloween costume for SCP-173