Hollywood actress Sandra Bullock says she and Melissa McCarthy have no plans to make a sequel to their big-screen comedy \"The Heat.\" \"I know they say never say never, but right now, I can\'t imagine it,\" Bullock told EW.com. \"I don\'t want to ruin what Melissa and I had. If a miracle happens where [a script] shows up that really and truly outdid the first and provided an experience that was better than the first one, then I would look at it. But I\'m not there.\" Bullock cited her lack of luck with the box-office duds \"Miss Congeniality 2: Armed and Fabulous\" and \"Speed 2: Cruise Control\" as one reason why she wouldn\'t leap to star in a sequel to \"The Heat.\" \"If you look back on my illustrious sequel work,\" she laughed. \"Nothing has proven successful. ... A sequel is such a daunting thing because you don\'t want to lose the magic and the charm of the first one.\"