ONLY FUN on Instagram: "This viral post features a 11-second clip of a German prank using a "Prank Gun" toy that unexpectedly fires foam darts backwards at the shooter, turning retaliation into self-inflicted hilarity and garnering 2.7 million views overnight.The toy, a foam-dart variant of 2025's trending reverse-squirt guns topping Amazon's new releases, exploits surprise for laughs, with sales driven by social media shares like this one.Replies blend empathy for the victim's shock with shared