Composite sound of a heavy metal ramp being lowered with hydraulics and thudding loudly on the ground.
Composited sound from multiple sources of a future ship/spaceship engine starting up for launch
A mug slamming on a table, sloshing and splashing the liquid inside.
Created in Audacity with sounds from Freesound.org users:
Iwdickens http://freesound.org/people/lwdickens/sounds/269008/
Rocky12345 http://freesound.org/people/rocky12345/sounds/120925/
A Phoenix style knife being drawn, blades extended and thrown at a target.
A solid object being thrown aside and clattering to the floor.