A man who was riding an electrical bike died after being hunted and mown down as part of a feud, court has heard.
Joey Johnstone, 28, was pronounced dead at the scene in Moore Avenue, Bournemouth, in the early hours of 9 April.
Zoe Treadwell, 36 and Taylor Warwick, 18 - both from Bournemouth - and a 17-year-old boy, who cannot be named, are charged with murder and manslaughter.
Ms Treadwell and Jonjay Harrison, 25, from Bournemouth, are accused of attempting to murder or intentionally wounding Joshua Lovell, as well as deliberately wounding Free Jenkins on 1 May.
Sarah Jones KC, prosecuting, said the "horrific collisions" involved cars being driven "deliberately and with shocking aggression into young men who were riding e-bikes".
She told the court: "A grievance arose between one group of associates and another that has resulted in the people now prosecuted in this case thinking they were entitled to use any methods to instil fear, to teach people a lesson.
"They have sought to obliterate their enemies and the weapons with which they chose to do that have been cars."
Police were called at 02:00 BST on 9 April to a report of a collision between a black Range Rover and an e-bike rider in Moore Avenue, the court heard.
The car, driven by Ms Treadwell, left the scene at speed, Ms Jones said.
Mr Johnstone was pronounced dead from a head injury a short time later.
The second collision, involving two riders on a single e-bike, happened shortly after 13:00 BST on 1 May in Kinson Road.
Mr Harrison drove a dark-coloured Mercedes onto a pavement to hit the bike following a "grim chase", Ms Jones told the court.
Mr Jenkins had his lower leg amputated and Mr Lovell suffered rib and spinal fractures, the prosecutor added.
She continued: "The men were targeted, located, hunted and then mown down by Ms Treadwell or those doing her bidding."
The prosecutor said Mr Lovell had previously been in a relationship with Ms Treadwell, but the full background to the feud was unclear.
The defendants deny the charges and the trial continues.