[SPOILERS] When Noelle is dragging the tub of water across the floor, enough water splashes out of it that it's only half to a third full. But when she tries to drown Adrian in it, it's completely full.
Characters are being subdued by having a chloroform soaked cloth held over their face for just a few seconds. Chloroform DOES NOT WORK LIKE THAT. It takes minutes of relaxing and breathing the fumes, or requires the recipient to be already under the influence of something else. It's also extremely volatile, so the prospective victim will smell it as soon as they're in the same room. Also, it absolutely needs to be freshly applied to the cloth, or it simply evaporates away.