I got a reversible jacket for Christmas. I can't wait to see how it turns out.
Why this joke works
Turning the Jacket Out
Waiting to see how something turns out means waiting for its final result. A reversible jacket can also be physically turned inside out to reveal its other side. Tell the gift announcement with ordinary enthusiasm and make the second sentence sound completely sincere. The phrase “turns out” then works as both anticipation and instructions for wearing the jacket differently. Reversible clothing is designed to be worn with either side facing outward, so turning the jacket out reveals another appearance.
A closer look
A Future Result Is Hidden in the Garment’s Construction
“See how it turns out” normally means waiting to learn the result of an uncertain situation. A reversible jacket must be turned inside out to reveal its alternate side, making the phrase a literal plan for wearing it. The Christmas detail gives the speaker a believable reason not to have explored the gift yet. The anticipation sounds emotional until the final words describe a physical action.
Fact behind the joke
Reversible Clothing Must Work From Both Sides
The Smithsonian’s clothing collections include reversible garments designed to present a usable exterior on either side. That construction can require concealed seams, compatible fasteners, labels placed carefully, and fabrics selected for two visible surfaces. Turning such a jacket inside out genuinely changes its appearance without changing the garment. The joke uses that design feature to literalize uncertainty about how something “turns out.”