You might inadvertently trigger a security lockdown at an airport.

A man disembarking a flight at Australia’s Sydney Airport was apparently so engrossed in whatever he was watching on his iPad that he couldn’t take his face away from the screen to pay attention to where he was going when he exited the plane into the airport. With the iPad still glued to his face, Sydney Morning Herald reports that the man accidentally wandered through an exit tunnel into a domestic terminal without clearing security. The entire terminal was promptly evacuated, and all the passengers had to be re-screened before being allowed to board their flights.

Here endeth the lesson.