Attacked by Washington Post Pop-up Ad

Wow, my mac PowerBook just had a siezure, chugging and chugging, rainbow wheel, for a long time, seemingly frozen dock... barely got to my Finder file directory... then I saw a black and red Washington Post advertisement box. I clicked it off and *sigh* the chugging dissipated, rainbow wheel went away, I had my computer back.

Does the media trust do this on purpose? Was I just hacked? WTF? Just paranoid? LOL