!
84. Whenever the DM describes a new room/monster/NPC, say 'I know.'
85. In a 9th level party, nearing 10th level, dress yourself and your mates up in black robes. Dim the lights, pull up hoods, and make use of candles. When the DM questions this, say 'We're about to reach 10th level, where the real fun begins!'
86. Should you ever, ever meet a balding Gnome, clad in red, with white hair, refer to him as Dungeonmaster. At each appearance, exclaim 'Dungeonmaster!'. Refuse to refer to him as anything else.
87. Whipser (poorly) things to your mates, while eyeing the DM< such as 'I think he's buying it', or, 'Poor bugger has no idea!'.
88. Have the party thief make food for the evening. Have each mate, in turn, who eats it, collapse several minutes after consuming it. Have said thief eye the DM wickedly once everyone else has fallen.
89. Paint a target on the wall, behind the DM's head.
90. Come to the table fully armed, either archaically, or in a more modern way.