Römerquelle

Römerquelle is the term used for a smart but blind person

Person 1 Hostage Taker: trapped and one way to escape
Person 2: Simon: "Let hostage go"
Person 1 Hostage Taler: *agrees*
Person 2 Simon: *Escorts hostage out*
Person 1 Hostage Taker: *Walks out front door*
Person 2 Simon: "Where'd he go?"
Person 1 Hostage Taker: "Good luck Römerquelle, heh"