Sadly for the world number 49, he could not capitilise on the momentum and fell to a 4-2 defeat at the hands of Stephen Maguire in the last-32.
"It's an amazing feeling," said Mehta. "The balls opened up and I knew it was an opportunity by the time I was on 32. I've only made one 147 in practice and one in a match in India.
"I hoped one day I would be lucky enough to make one in a pro event and today it happened out of the blue."
'Like a thunderbolt' - Lisowski wows with brilliant pot
Ronnie O’Sullivan coasted into the last-16 for the loss of a solitary frame as he beat Noppon Saengkham 4-0, Robbie Williams 4-0 and Barry Hawkins 4-1.
Judd Trump and Xiao Guodong also kept their hopes alive after nervy 4-3 victories over Mitchell Travis and Jamie Cope respectively, while Mark Allen eliminated teenager Luca Brecel to stay in the hunt.
'An unbelievable shot' - Lisowski wows with brilliant red
‘Oh dear!’ - Lisowski the beneficiary of ‘incredible’ fluke