Convict posts himself to freedom

Ananova:
A prisoner wrapped himself in a large parcel and posted himself to freedom from a jail in Austria.
Bosnian Muradif Hasanbegovic, 36, was serving a seven-year sentence for robbery in the Karlau prison, near Graz.
He escaped from the workshop where he helped package and post parts for lampposts.
The man packed himself up in a parcel, and other convicts loaded him onto a lorry. Once clear of the prison he broke out of the parcel, jumped off the back of the lorry and fled.
The lorry driver told police: "I noticed the tarpaulin had a hole in it just as the prison called me and asked 'Have you noticed anything funny? We are kind of missing a prisoner'."

How can you be kind of missing a prisoner?