Falling in love can be scary, especially when you're unsure if what your feeling really is love. Nearly everyone says that you never really know until you know – that it just happens at the most unexpected time. Maybe it's the way they sing to the radio, or come out of their shell and are comfortable being weird around you. There's also a chance it's an odder reason like them telling a bad joke, or you giving up the last slice of pizza for them. These Redditors took to the web to explain the moment they knew they'd fallen for someone.