It was the third night of practice at the Isle of Man TT and Dean Harrison on board his Kawasaki was just too hot to handle again.
The Englishman notched up an incredible two 133mph laps to unofficially break the TT Superbike lap record on his second lap of 16 minutes, 57.728 seconds for a speed of 133.462mph.
This was some seven seconds ahead of the Tyco BMW of Michael Dunlop, with a speed of 132.319mph.
Harrison became only the second rider alongside Dunlop - whose older brother, William, yesterday withdrew from the event - to lap the Mountain Circuit in under 17 minutes and, though it wasn't official due to not being in a race, it puts him in a great position to challenge the Ballymoney man come the Superbike races.
As Harrison quickly switched from the Superbike to his Silicone Superstock bike, he ominously remarked: "I wasn't even trying there."
Dunlop was, meanwhile, trying two Superbikes and was in and out of his pit while Tyco BMW team-mate Dan Kneen set a personal best lap of 132.462mph for third fastest on the night.
Peter Hickman with a 132.169mph lap was fourth ahead of Conor Cummins on the Padgetts Honda at 129.756mph, the top six completed by Michael Rutter at 129.583mph.
Derek Sheils and his Penz13.com BMW team-mate Jamie Coward were 12th and 13th - a tenth of a second separating them at 127.575 and 127.554mph respectively - while Lee Johnston's fastest speed on the Honda Superbike was 126.873mph, just ahead of Ian Hutchinson 126.428mph and Shaun Anderson on 126.428mph, while Derek McGee recorded a personal best lap of 124.456mph.
Johnston had set the early pace in Superstock at 128.288mph, but he was soon swallowed up by Harrison, who put in a standing start lap of 130.553mph only to see Hickman on the Smiths BMW go half a second faster, before Kneen put in a late lap of 129.140mph for third fastest, dropping Johnston to fourth.
Cummins and James Hillier completed the leader board with 128.154 and 128.110mph laps, 'Conrod' just three-tenths faster.
On his evening's work Harrison added: "Conditions were really good out there, although the low sun was a bit of a problem. I felt real comfortable on the bike and I have a few changes to make on the Superbike and I know there is more to come."
John Burrows' Cookstown BE Suzuki runner Davey Todd again upped his speed to 121.97mph, fastest of the newcomers.
Michael Dunlop on his MD Racing with Carl Cox PTR Honda put in one lap on the Supersport machine at 125.206mph to top the session, with Hillier right on his tail with 124.919mph and Ivan Lintin third fastest despite a small spill at Governor's Bridge.
Former BSB champion Josh Brookes put the McAms Yamaha into fourth position with a 123.718mph single lap, with Lee Johnston on the Padgetts Honda fifth fastest and Gary Johnson sixth on his Triumph 675cc.
Harrison's luck was out in Supersport, retiring at Ballacraine on his first lap.
Though the Lightweight times were well off the unofficial lap record set by the Paton of Michael Dunlop on Saturday, it was the ER6 Kawasaki of Lintin who was fastest last night with the only sub-19 minute lap, recording a speed of 119.191mph, with Italian Stefano Bonetti (Paton) second fastest at 118.848 and Adam McLean from Tobermore third fastest on Roy Hanna's ER6 at 116.984mph.
John Holden and Lee Cain were fastest of the three-wheeler brigade at 115.732mph.