Hearts were outclassed by Portuguese giants Benfica as the Tynecastle side fell to their joint-heaviest European defeat in the first leg of their Europa League third qualifying round tie.
Three of Benfica's six goals in Lisbon were gift-wrapped by Wouter Vrancken's men, who conceded after only two minutes on a night that threatens to leave psychological scars.
No one was expecting an upset, but the ease with which Benfica cut Hearts apart at times in the first half left even the neutral wincing at such a mismatch.
Veteran Rafa Silva got the scoring started, latching on to Leandro Barreiro's cutback to tap in the opener and show Hearts the quality they were up against.
The second was similar to some of the goals Hearts conceded away to Sturm Graz in their Champions League qualifying humbling two weeks ago.
A corner was whipped in and, all too easily, captain Tomas Araujo was allowed to beat Blair Spittal in the air and nod home.
Hearts rallied a little, but the exertions of chasing the game told quickly as Laurent Mendy pulled down GIanluca Prestianni to concede the cheapest of penalties.
Vangelis Pavlidis drilled the spot-kick down the middle and Hearts were 3-0 behind at half-time.
There were little moments for Hearts, though. Mendy hit the bar with a header after brilliant work from Calvin Miller on the right. Spittal fizzed a free-kick just wide, and there would even be a goal to remember for Tom Renaud.
But first, Hearts gave the ball away on the edge of the box and Prestianni punished them, curling in the fourth.
Job done for Benfica, passage effectively secured, and foot taken off the gas. That allowed Hearts to play, and play they did.
In a lovely Hearts move, the ball was slipped to Renaud and he arrowed into the bottom corner to send the away fans into the night with something to remember.
As the game was winding to a close, Benfica fired off another few reminders of the gulf between the sides, stealing possession to allow former Aston Villa striker Jhon Duran to lash home a fifth.
And with the last kick Norwegian midfielder Andreas Schjelderup scored from the spot, after Oisin McEntee handled in the box, to equal the margin of Hearts' 5-0 European defeat to Tottenham 15 years ago.