This is the cactus that grew so tall and at such an angle that it kept falling over. So we chopped its top off and then later it grew back an extra four tops. It still leans at a funny angle but it no longer generally falls over. It did however once fall over and roll under the television and sat there for a day before we noticed it. Since then it has behaved well and sat nicely on the windowsill. It has never flowered though.