The 170 is known as the big fish but hitting two has been known as the whale. The second in particular sent the commentators into raptures and you can see both below.
The prize fund breakdown for this tournament can be found
here. Click here for more information about the Grand Slam of Darts.
https://twitter.com/OfficialPDC/status/1062076534251352065
https://twitter.com/OfficialPDC/status/1062078069433724929