Extravagant entrepreneur know for his futurey projects has explained his Hyperloop project in detail to Businessweek’s Ashlee Vance ahead of publishing his blog post and holding his press conference today, and the resulting project is an ambitious project that borders on the crazy. This is the guy who build Tesla Motors and SpaceX, but he actually says he regrets bringing it up to begin with and says it’s up to someone else to build it.