Knoxville News SentinelView Comments It's finally springtime in the Smokies, and as nice as it is to bask in nature, Michelle Eberhart and her friends learned the hard way that the great outdoors belongs outside.The friends were visiting Great Smoky Mountains National Park for the first time this weekend when an unexpected guest pushed open the door of their cabin. Eberhart — of Shelbyville, Indiana — discovered a black bear walking around the bottom floor of the cabin while three other bears watched from the back porch of the building. "It was almost surreal. It...…Knoxville News SentinelView Comments It's finally springtime in the Smokies, and as nice as it is to bask in nature, Michelle Eberhart and her friends learned the hard way that the great outdoors belongs outside.The friends were visiting Great Smoky Mountains National Park for the first time this weekend when an unexpected guest pushed open the door of their cabin. Eberhart — of Shelbyville, Indiana — discovered a black bear walking around the bottom floor of the cabin while three other bears watched from the back porch of the building. "It was almost surreal. It...WW…