The Fifth Amendment and Touch ID

Here's what I want. A very quick and preferably non-obvious / grossly apparent way to trigger my touch ID enabled phone to force prompt for passcode/word.

Push the power button thrice. Touch with a different finger. Whatever. Something that takes a second, involves no "obvious" movements or none that can be stopped part way through, and that disables touch sign-on until I actually enter the passcode/word.

Will it stop someone rubber hosing me? No. Will it hinder BS like the above? Maybe. (Especially when I have a few moments to react before the aggressor gets to me.)

Although most like the convenience of using a fingerprint to unlock, it would be nice to have the option of turning it into a form of pseudo keypad by requiring two to thee different fingerprints in sequence. That should make it a bit more secure as well as misdirecting those that assume the types of security.

Unless you're in the habit of cleaning your phone after every single use your fingerprints are already on the device. Case 2 has different dimensions than what is stated.

I would like phones to support a duress finger. If you try to unlock with your duress fingerprint, it disables fingerprint access, requiring your long password.