Knock impact

[DavidRieman]

In relation to #52, @duaneking adds:

The knock generates sound/movement (vibration that also creates sound as waste)
For example knocking hard enough on a door can make something on a table next to the door fall off that table.

While I don't think we want to try to build a totally hidden physics simulation, to accomplish the sort of thing you're describing, this is how I see it fitting well into the WheelMUD paradigm:

• One could adjust the Knock command's initial messageStrength on the Hearing aspect based on game-based factors: Character strength could affect it (including strength mods from being a Giant or whatnot), and the command could further adjust the messageStrength based on command factors like typing "knock hard on door" or "knock door hard" (or softly for the inverse). As-is this would probably involve taking the Knock.cs command and making a higher priority custom-modified version of it in your game's libraries, that takes the game-specific elements into consideration.
• For a game entity you want to react to the vibrations of loud sound, you'd build a Behavior like SoundReactiveBehavior, or one more specific to your thematic game needs here if a generic approach is insufficient. (Generic approach could be giving SoundReactiveBehavior a property for what command text to make the entity execute in response to any sound that meets the property-specified threshold.) The behavior would listen to all relevant Sensory Events, and if the strength upon reaching the entity is strong enough, reacting accordingly with code. (To fall of the table, in this example.)
• Another interesting factor here is that we could propagate such events to surrounding rooms by default, following an algorithm along the Yell lines where it reduces some strength each time it moves out to the next room. So the resounding boom of an angry giant pounding on the gates could be heard several rooms away.

For "falling off the table", a Table could have a Contextual Command which lets child entities that are "on" it to fall (becoming children of the room instead).