So how does this work?

[Lecavalier]

A bunch of buildings were...... removed 

[Demolution]

Funky revert?

[SlackerLinux]

maybe they blew up from lack of power?

[Kiwi]

I haven't played in a while, but what is that map?  Perhaps the map has some feature where stuff falls down and blows up buildings?  If a teammate kills the power supply/egg, they are blamed for it afaik.

[A Spork]

That looks like the outside of spacetracks...