The incident took place in Vile Parle (West) area, where Mahadik is seen clearly on CCTV footage assaulting Chetan Geveriya (28), who works at Trupti Sweet and Farsan Mart on DJ Road, with a bamboo stick.
A day ago, Mahadik had sent another person to the shop demanding 100 'vada pavs', a popular street-food in Mumbai, free of cost. Chetan told him that they didn't have so much stock, so the person left.
The next day, Mahadik allegedly called Geveriya on his mobile phone and abused him, and said he must hand over 100 vada pavs immediately to a person he was sending.
Geveriya said Mahadik should speak to the owner of the shop first. Irked, Mahadik himself went to the shop and hit Geveriya with a bamboo stick and threatened to kill him, police said.
Geveriya, though not seriously injured, was taken to Cooper hospital in Juhu, police said.
The incident was captured by the CCTV cameras in the shop and Juhu police registered an FIR. The footage was also aired by some local news channels. Mahadik was arrested and a local court sent him to police custody.
This incident comes in the wake of another in neighbouring Thane where a Shiv Sena worker was arrested for allegedly assaulting a woman traffic constable three days ago. CCTV footage of the incident had gone viral.
Meet the man behind the sedition case against Rahul Gandhi
'I wanted to understand what happened to Amy and why'
PHOTOS: Inside Thailand's tiger temple
Budget: What's costlier, what's cheaper?
For the Jats, it was a question of 'moochh'