Imploded

Burst or collapsed inward with force, like a building crushed from outside pressure, or fell apart from internal failure.

From 'implode,' which is the opposite of 'explode.' Both come from Latin: 'ex-' (out) for explode and 'in-' (in) for implode, plus 'plodere' (to clap or strike). Implode was coined as a technical term in the 20th century.