Rick stealing a bus in "Summer Holiday". In the same way, him accidentally foiling a real bank raid during their own bank raid and getting loads of money, despite the fact he held the guy (referred to as "Mr real robber") up with a water pistol.
In "Bambi", Vyvyan shouting, "I'm completely bloody sick of this!" and kicking through the stand into one of the posh kid's head then shouting "Achtung!" and throwing a grenade in - blowing up the posh kids from Footlights College, before demanding, "Give us some easy ones, Bambi! You big bottom-boil!"
Vyvian's very first appearance in the first episode, as listed in the moment of funny page.
Neil actually standing up to Rick's verbal abuse (egged on by Vyvyan) in "Nasty", although it was short-lived.