Rabbit haemorrhagic disease escaped containment from an Australian Government research facility and spread across Australia.

They escape containment and finally manage to destroy the madman by smashing his glasses, without which he cannot see, and he falls to his death.

Radioisotopes have and continue to escape containment, but there's no indication yet that these are anything beyond secondary decay products with short half-lives.

On May 23th 2013 a CALFIRE controlled burn escaped containment, becoming the San Felipe Fire.

Just as he comes up with the answer, however, Andromeda mutates into a form that degrades synthetic rubber and plastics and thus escapes containment.

You escaped containment.

You have escaped containment; they cannot.

Unbeknownst to the brothers and their Sorcerer guides, one wraith escaped containment and seeks retribution against the two.

Some of this tritium escapes into containment and is generally recovered; however a small percentage (about 1%) escapes containment and is considered a routine radioactive emission (also higher than from an LWR of comparable size).

John Stewart's powers are revealed to come from a Qwardian superweapon he absorbed, the Void Hound, and that is trying to escape containment by indirectly harming Stewart, as it slowly gains more power above him and his ring.