It's like a car crash. You can't help but rubber neck.

Mercedes Corby is suing one time friend over unpleasant tales told over at Today Tonight. The trial has been pretty amusing.

Today friend's mum took the stand and described how she'd been duped into being a mule for MC.

You can read about this tale of woe here.

Here's a snippet.

She had also dropped in on Mercedes Corby who lived on the Gold Coast and on one of those occasions in 2002 Mercedes had asked her to take a parcel with her.

The parcel was light and wrapped in brown paper but she had not known what was in it, Ms Campbell told the court.

When she arrived at Byron Bay Ms Campbell said that her daughter Jodie had unwrapped the parcel and she was "mortified" to find that it was marijuana.

Ms Campbell's response had been: "You f---ing little bitch."

She then called Mercedes Corby and told her: "Never do anything like that again or I will cut your balls out and hand them to you on a silver platter."

Area woman's threat fails on basic anatomical grounds.