A drunken party guest attacked his best friend in a fit of rage after he was turned away and his mate was let in.
George Drew had walked six miles from his home in East Devon to the party in Exmouth only to find he had been the victim of a wind-up.
He was refused admission by his friend Josh Maunder and this led to an argument when the two men met up later that night, Exeter Crown Court was told.
Drew vented his frustration on Mr Maunder, who rode his moped to meet him near the party venue. Drew lashed out with a bottle which he smashed his friend's helmet, then punched him in the face, chipping a tooth.
The 20-year-old apprentice was drunk and under the influence of cocaine at the time and has since settled his differences with his Mr Maunder.
Drew, of Woodbury Salterton, near Exmouth, admitted causing actual bodily harm and damaging Mr Maunder's moped, helmet and goggles and was jailed for eight months, suspended for a year, ordered to do 100 hours' unpaid community work, and pay £490 compensation and costs.
Recorder Rufus Taylor told him: "I am going to treat this as a blip. You are 20 and of previous good character and are entirely remorseful.
"For some bizarre reason you decided to attack one of your best friends. It does not appear as if the false invitation you received was anything to do with him.
"You were invited under false pretenses to a house and you had drunk quite a lot and taken cocaine. You pushed him to the floor and struck his motorcycle helmet with a bottle and punched him in the face.
"This was a sustained assault in which you used a weapon when you were under the influence of both drink and drugs."
Beth Heaton, prosecuting, said Drew walked from Woodbury Salterton to Exmouth after receiving a text inviting him to a party and became upset when he was not allowed in.
Mr Maunder, aged 18, who has been friends with Drew since primary school, went to the party but agreed to meet Drew, who texted him five times during the evening. He rode his moped to meet him nearby.
Drew got on the back of the moped but became angry when Mr Maunder asked him to get off and lashed out with a cider bottle, hitting it against the victim's helmet until it smashed.
He then punched him in the face, chipping a tooth and threw the moped to the ground where he kicked it and stamped on it.
Mr Stephen Nunn, defending, said Drew is very sorry for what he has done, wants to pay compensation for the damage to the moped and is now friends with the victim once again.
