Google made plenty of nerds happy earlier this week when it began reaching out to the 8,000 people that would have the privilege of spending $1,500 on the company’s head-mounted Glass display, but that thrill wound up being short-lived for some. About seven hours after announcing that the outreach to would-be Glass Explorers began, the Glass team once again took to the project’s Google Plus page to admit they needed to rescind some of those invitations.