They hung up as soon as I answered.  Hello?....silence, click.

They claimed to be from ERG national research. I hung up.

Just hung up.

Hust hung up. Wouldn't leave a message. No name on display.

Probably somebody calling on behalf of that smug little dipstick Bad Wall. They just hang up and can't be bothered to actually talk to you, it's very annoying,....just like Brad!