It is a rare occurrence, but it is possible that you may see windows open and a cursor moving in a lab that you have just deployed in the VMware Hands-on Labs. Before you reach for the End button to kill the lab, in the immortal words of Douglas Adams, “Don’t Panic!”
Does this mean that you have been assigned the same lab that someone else is already using? Based on the way that lab entitlements are managed by the VMware Learning Platform, that is unlikely. Instead, this probably has to do with some new monitoring and proactive failure notification we implemented in a subset of our 2014 labs.