Are Complex Mechanical Doorknobs Like Those in Movies Realistic?

[reinaldo]

Hey Everybody! this is an unusual question!...

Do you know if it actually Exist those Complex Mechanical "doorknobs" like the ones you see in Indiana Jones and National Treasure?...do they exist?...can they be done?...cause the company hiddenpassageway.com builds hidden passages for homes but the doors are opened with simple lever mechanism...but i mean does complex mechanisms seen in those movies could be done??...

 

[Danger]

You can make the trigger mechanism as simple or as complex as your imagination and wallet can handle. Just keep in mind that the more complex it is, the more prone it is to failure.