I guess that cannot work, because:Zimon wrote: Then you arrange with youre mistress that she will be in the next room. And in your hand you have a walkie talkie or another device with an alarm siren or something that alert the person in the next room. Then it will only take a few seconds for that person to storm inn and assist in an emergency.
On a normal day the atmospheric pressure will press the upper latex layer of the vacbed down with a force of 10 N per cm^2. That equals the force created by one kilogram for every squarecentimeter of skin on the finger you want to move. Approximately the length of an index finger is about 10 cm. Its diameter is about 1 cm.
The total surface will then approx. be 32 squarecentimeters.
Are you sure that, when in panic, you can move 32 kgs with nothing but your index finger?
For my own part, I'm sure I can't move them when not being in panic!
For the obvious reasons: It cannot work!
P.S.: On a bad weather day with less atmospheric pressure the weight you'll need to overcome with just one finger will still be significantly more that 25 kgs.
PLEASE, do not try this!!!