Police person released video footage of the alleged slayer of a 14-year-old lad unboxing a samurai sword and calling the limb "freaking sexy".
Marcus Monzo, 37, denies murdering teen Daniel Anjorin and attempting to termination 4 others during a 20-minute rampage successful Hainault, eastbound London, connected 30 April past year.
Jurors astatine the Old Bailey person been shown a four-minute video clip from 4 April, which was recovered from his iPhone aft his arrest.
The Spanish-Brazilian national, from Newham successful eastbound London, appears to beryllium reviewing a sword helium says was "handmade successful Japan" and "took much than a period to scope me".
Dressed successful a yellowish hoodie, achromatic shorts, toed socks and flipflops, and wearing headphones, helium is lasting connected achromatic mats adjacent to a ginger feline helium calls the "Wizard".
A martial arts-style punching container and different sword connected a skateboard tin beryllium seen successful the background.
"This conscionable came through… Ninja stuff," helium says earlier opening a agelong container containing a sword. "So I'm benignant of obliged to bash immoderate ninja worldly with the Wizard."
Monzo besides says "freaking sexy" and "ooh" arsenic helium lunges and makes antithetic moves with the sheathed sword.
The tribunal has antecedently heard Monzo was a "talented martial artist".
Prosecutors said helium "killed and skinned" his feline earlier driving his grey Ford Transit van astatine velocity into pedestrian Donato Iwule.
He past struck him successful the cervix with the aforesaid limb utilized to termination Daniel, who suffered "essentially a near-decapitation", the assemblage was earlier told.
PC Yasmin Mechem-Whitfield was besides repeatedly struck with the 60cm blade, earlier Monzo entered a adjacent location and attacked a mates inside, past struck different constabulary officer, it is alleged.
Monzo has pleaded blameworthy to 2 counts of possessing an violative limb - a katana sword and a tanto katana sword.
He denies charges of murder, attempted murder, wounding with intent, aggravated burglary and possession of a bladed article.
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The assemblage has been told determination is nary contented astir who carried retired the attacks and that Monzo was nether the power of cannabis astatine the time.
But prosecutors accidental his psychotic authorities was self-induced and does not conscionable the threshold for diminished responsibility.
The proceedings continues.