ANSWERS: Connection Wall 2

It's been thirteen days since I've posted my last puzzle of 2015 (which you can still solve here), so it's time for me to reveal the answers! But first, here are all the people who have solved that puzzle within that time frame:

• YYW ****
• Yossi Fendel ****
• Adam Weaver ****
• Eric Maddy ****
• Brad Eldredge ****
• Grant Fikes 1/10 of a star (Let's just say he really regretted using Google for one of the categories...)
• Dan Simonds ****
• Sam Levitin ****
• Mom ****
• Lynn Sweeney ****

Now just head below the break for the answers, along with some solver comments!

• [The Blue Umbrella], [Presto], [Geri's Game], & [Tin Toy]: PIXAR SHORT FILMS
• [Hemispheres], [Fly by Night], [2112], & [Moving Pictures]: RUSH ALBUMS
• [Lifebuoy], [Irish Spring], [Lava], & [Dial]: SOAP BRANDS
• [Grenades], [Detector], [Screen], & [Signals]: WORDS THAT FOLLOW "SMOKE" (Smoke _____)

Solver Grant Fikes had a tough time with this one; after a couple Google searches, he had three of the categories, and [Detector], [Grenades], and [Screen] are the only squares that remained (He still had [Signals] under Rush Albums). Then this happened: "I suck at puzzles, so let's use Google one more time. [...] Oh, goodness, they're just words that follow "smoke". Never heard of smoke grenades; I associate grenades with being much more deadly. Of course, Signals finishes the category. Give me one-tenth of a star. Having to use Google to solve a category which has nothing whatsoever to do with pop culture is shameful."

Solver Adam Weaver said that this was a "Nice puzzle with some good overlaps. Just curious: would it be possible to put an entire decoy category in? (4 related answers, but you can't complete the puzzle using them together)" (For the record, there's an iOS/Android app called Red Herring that does indeed do what he describes, so it's certainly possible)

Solver Sam Levitin also said this was a "Nice puzzle; had me scratching my head a bit."