get a small pin and pit it right through the plunger. it will release the suction pressure =]
To remove a suction cup, gently pull one side to release the seal created against the surface. Avoid pulling too forcefully to prevent damaging the suction cup or the surface it is attached to. If necessary, you can also use a blunt object to help pry the suction cup away from the surface.
Proffesionals use a special type of suction cups, but a hammer works too.
I wouldn't want my last suction cup to slip, just as I reach the top of the window. The geckos have a very clever suction cup design of the soles of their feet.
The iPhone is not made to be opened, But if you know what your doing their are 2 small screws at the bottom by the charger, your remove them and use a suction cup on the screen to pull it up
Use a pump and hose.
Most GPSs that are designed for use in vehicles will come with a holder which attaches to your windshield. This is usually done through a small rubber suction cup. It is also possible to just place the GPS on the dash or on the seat besides you.
use a bat
It uses its suction-cup-like mouth to absorb food.
Use a hammer
A paint pen. then remove with a razor blade.
Support system....they have suction cup mouths & they use it to clean parasites from the shark.