Sulu's "Target that explosion and fire." and Kirk's "Fire!" in 'TUC'.
Riker ordering the topedo fired on the Bird of Prey in 'GEN'.
Reliant's port warp nacelle being blown clean off the pylon in 'TWoK'.
Kirk offering to save Nero and his crew and his subsequent exchange with Spock before firing everything thing at the stricken Narada in 'Star Trek (2009)'.
The Defiant and the Fleet vs. the Borg Cube in 'FC'.
Dukat walking into Sisko's abandoned office, seeing that the baseball is still there, and understanding what that meant. And the subsequent reveal of the impressive Starfleet armada at the end of "Call to Arms" DS9.