Sentence:  On "Hacksaw Ridge", Oliver and his team of effects artisans devised <WSD>gags</WSD> for that spectacular flamethrower shot along with other devastating body and bullet hits, and several mortar and full-scale explosions, all aimed at communicating the reality of battle. 
Meaning of the word marked with <WSD> tags:  a device or trick used to create a practical effect; a gimmick