Tanks filled with a clear liquid

Shorthand for an unforgettable story from a Star Wars d6 campaign:

A gunslinger PC named Sima had gotten separated from the rest of the party and ended up halfway across the galaxy in a secret Imperial science facility. He was fleeing a platoon of stormtroopers when the following exchange took place:

Sima: I run through the door at the end of the hall and close it behind me. GM: You're in another deserted lab, with a bunch of workbenches covered in science equipment. Along the back wall you see tanks filled with a clear liquid. Sima: Sweet! I get inside. GM: [perplexed] Okay. You're inside. Sima: Before the stormtroopers come through the door I figure out how to control the weapons!

At this point the session paused for extended laughter and for the GM to clarify that he meant bacta tanks, not military tanks. When Sima's player was asked why the description of "filled with a clear liquid" hadn't tipped him off sooner, he responded, "I figured they were some sort of crazy space tanks."