Inverness CT sit second in the Scottish Premier League as they leapfrogged Hibernian with a deserved home win.
Graeme Shinnie's free-kick was headed past Hibs keeper Ben Williams by Ross Draper in the 13th minute.
Antonio Reguero tipped a Leigh Griffiths effort over the bar when the Hibs striker was through on goal.
But Inverness stepped up a gear and made it two when Richie Foran headed in David Raven's cross, then Billy McKay added a third from Aaron Doran's pass.
Hibs had slightly the better of the opening exchanges with both David Wotherspoon and Ivan Sproule asking questions of the Inverness defence.
But it was Hibs' own back line which was their weak point and Draper's opener came when he was allowed a free header at the back post from a well-placed Shinnie free kick from just outside the left angle of the box.
Hibs might have equalised but for a superb save from Reguero just after the half-hour.
A defensive mistake by Josh Meekings allowed Griffiths in on goal but Inverness's Spanish keeper made a fine job of tipping it away for a corner.
As the first half progressed Caley Thistle became dominant and this continued into the second, although the closest they initially came to extending their lead was an off-target effort from Doran and another from Owain Tudur Jones who went straight to keeper Williams.
Then, on 76 minutes, Raven's cross found the head of Foran who found the net despite the best attentions of Paul Hanlon and it seemed as if there was now no way back for Hibs.
Then with three minutes left Doran burst down the right and his cross found McKay who completed a memorable afternoon for the Highlanders.