This cavern may be unstable.

- Their mutations might be unstable.

- Their mutations might be unstable.

That situation continues to be unstable.

Hastings said something about her being unstable.

Τhe whole place could be unstable.

The effects of the device may be unstable.

Notwithstanding, he said, the security situation continued to be unstable.

The security situation in Lebanon continues to be unstable.

Everything down there is gonna be unstable as hell.