The appalling attack occurred at Woolworths Greenfields at Mandurah in Western Australia's southwest, just two days after the supermarket banned the use of plastic bags.
'A male customer in the self-serve area swore loudly at a female worker,' SDA assistant state secretary Ben Harris told The West Australian.
'She provided him with some complimentary bags and apologised. He made a mistake by scanning an item twice, the worker came to help him remove it and he walked up behind her and put his hands around her throat.’
The shocking incident prompted Woolworths to issue a statement advocating the rights of their staff.
'The safety of our team members is of the utmost importance and we do not tolerate abusive behaviour towards them in any circumstance,' Woolworths WA state manager Karl Weber said in a statement.