There is not much of a secret or trick to dipping something in chocolate and getting it to harden, actually. Simply melt semisweet chocolate by itself or with a little cream or butter. Dip, then refrigerate. When the chocolate is cooled, it hardens.
10 to 20 minutesPlace in the refrigerator, chocolate usually takes 10 to 20 minutes to set in the fridge and harden. Smaller chocolate molds may take less time to set up, and larger chocolate molds could take the full 20 minutes.
1:223:18How to Make Chocolate Harden at Room Temperature - YouTubeYouTube
The answer is yes, it will indeed harden instantly. Likewise, it usually takes three to five minutes to become firm and shiny. Remember the heating and cooling of chocolate to stabilize it for making confections and candies is tempering.
Speed is what defines the Flash, after all, so it makes sense. The dude can literally run through space and time. Superman can technically fly faster than the speed of light outside of Earth's atmosphere, but at the end of the day, he's always going to be a little bit slower than everyone's favorite Scarlet Speedster.
1 Barry Allen (Earth-Prime) Barry Allen is known as the Fastest Man Alive, and that isn't just a cute nickname. Eobard Thawne said that the speed of Barry is potentially unlimited. He reached Mach 13.2 from tachyons and continued to increase his speed to even faster levels since that time.
Superhuman Speed: Wally is capable of moving at incredible superhuman speeds. He was able to cover 7,000 miles in 6.25 seconds, and even accelerate far beyond light-speed to the point of entering the Speed Force dimension. He is faster than both Superman and Barry Allen, having beaten both in separate races.