Tempers flared during a recent taping of reality TV show Celebrity Rehab when actors Gary Busey and Jeff Conaway challenged each other to a fight.

Conaway accused the Into The West star of manhandling him and suggested Busey should be in a "psych unit" at a hospital, fuming, "You're a maniac, keep your hands off of me."

Upset Busey responded, "I'll break you tonight."

The Grease star then screamed, "Shove it up your ass."

Show leader Dr. Drew Pinsky insisted the two fallen stars spend a little time alone together to sort out their differences - and they quickly became friends again by confessing their admiration for each other.

The episode is set to air in the U.S. on Thursday.

(This news article provided by World Entertainment News Network)