A thug attacked a man with a bottle in an apparent "misunderstanding" about a taxi.
Christopher Pattison (34) hit Thomas McDade in Glasgow's Greenfield area last December.
Pattison was charged with assault to severe injury.
The victim had been waiting for a cab with his sister.
Ferguslie Park gang fight: four men stabbed and slashed
Prosecutor Pat Callender told Glasgow Sherif Court: "Pattison and his partner arrived in a taxi and there was a misunderstanding.
“He stuck Mr McDade with a bottle he was holding causing it to fall.”
Pattison continued to lash out as the victim's sister raced to get help.
He was clocked smacking Mr McDade with an "unknown item" before eventually halting the attack.
A blood soaked Mr McDade was treated at hospital suffering from facial wounds.
Lyndsay Gaughan, defending, said it was claimed Mr McDade threw the first punch.
She told the court: “He understands he shouldn’t have reacted in the way that he did.”
Sheriff Joseph Platt deferred sentencing for reports and remanded McDade in custody.
Want all the latest Glasgow news delivered to your phone? Then sign up for our new WhatsApp alert! Text NEWS to 07899711574 and then add the number to your contacts as ‘Glasgow Live’ for a daily dose of the good stuff ...
