What is happening here?

This is the excruciating moment a man had his penis grabbed by a police officer who mistook it for a deadly weapon during a body search. The embarrassing footage, captured in North America, shows the man being restrained with his hands behind his back. The topless man stands in the reception of an office as police carry out their job and pat him down to check for weapons.
Another picture after the cut

Meanwhile the man looks down at the officer's hand to see what he is doing - all the while he remains completely silent. After a few excruciatingly long seconds the policeman appears to realise his mistake and can be seen removing his hand in a rather sheepish manner.