The above advice is indeed true. To confirm these answers, as you wish, try this (it worked for me): Sail on a day with thunderstorms. Wait too late to drop sail as one approaches. When that first gust hits you, do not release the mainsheet (in my case, it was too tight). The boat will heel massively, everything unsecured inside the boat and cockpit will suddenly be piled up on the lee side, and the boat will round up into the wind! As others have said many times, the boat can handle more than you...