Show Me a Dwarf Thief, & I'll Show You a Dead Dwarf
(I play a rogue, and my party was exploring an ancient dwarven fortress from the days when demons flooded the world. So, every other door and every other wall had a trap. Between me and the dwarf skald, we spot most of the traps without a problem. With a few exceptions, such as this narrow hallway:)
Skald: Hey [Rogue], watch that square. It’s a pressure plate.
DM: In fact, what tips you off is in the engravings on the wall, there’s a dwarf pointing it out as if it was a funny prank.
Rogue: Oh, that’s rude. Alright, you can stay outside with the rest, I’m gonna check the rest of the hallway, and jump over the square.
(I make an acrobatics check to make a 10 ft. jump.)
DM: You make it over the pressure plate no problem, and are feeling pretty good about it until you hear the *click* of the floor beneath you. The hallway begins filling with water, and the doors lock behind you.
Rogue: Oh fuck you, dwarf architects.
(Thankfully, the strong party members kept the door open until I could escape. This continues until after we’ve fought scores of undead, beaten two haunts, and disabled a number of door and wall traps. We’ve seen a scorpion tail-shaped poison trap in a vault door, a gunpowder room door rigged to explode, a wall designed to spray acid a la The Mummy, and a chapel built to drop bombs from the ceiling that was left on by the priest before he died. We’re clearing out the last two rooms…)
Skald: [Rogue], another pressure plate.
Rogue: …Alright. I’m going to disable this pressure plate, and then examine IN GREAT DETAIL, the square directly behind it.
DM: Alright, you disable the plate by removing the hydrogen bags connected to them. These would have been opened into the hallway and ignited if you stepped on the plate.
Rogue: Holy shit, dwarves do not fuck around. What about the plate behind it? I examined that as much as possible!
DM: You pry the tile up with your knife, and you hear a *click*–
Rogue (Panicking): NO! EVERYBODY OUT!
DM: –But when you look underneath the plate, it’s clear that the floor tile is designed to make a *click*-ing sound when being manipulated with, say, by a rogue searching for traps. On the underside, the tile reads in dwarven, “Ya think we’d use the same trick twice?”
Rogue: … [Skald], I-I… I mean no disrespect to your race or your culture, but for rogues, dwarves are just… the absolute worst people ever.
Skald: I understand. I admire their craftsmanship and ingenuity, but there’s a reason there are no dwarf thieves.
DM: Okay, to the rest of the party, around the corner, you hear [Rogue] crying.