The players were in the tunnel and preparing to enter the pitch when the pre-match incident took place. After 20 minutes of waiting while the protester was removed and a quick second warm-up, the Scots started in style.
Hanson was influential down the left throughout the night, and clipped the crossbar early on in a sign of what was to come.
It was fellow winger Emslie, though, who got the crucial connection for the well-earned first goal following a fantastic pick-out by Thomas.
For all their dominant play, the Scots nearly fell foul of a shock equaliser as Sophie Howard’s slip allowed Sommer in for a one-on-one with Lee Gibson.
The goalkeeper stood strong to deny her though, and Howard made up for her error with a vital block seconds later.
Scotland took heed of the warning and countered in clinical fashion to score their second, Hanson having two efforts at it but her determination paid dividends.
She grabbed the assist in the goal of the night, too. In one of the neatest goals from Martinez Losa’s side in recent memory, Emslie finished a wonderful free-flowing move involving Lisa Evans and Thomas.
The quieter second half's highlight was the penalty, as Cornet’s cute work led to her being dragged to the deck and a spot-kick awarded.
While Emslie would have had the opportunity from the spot for a first international hat-trick, Tottenham’s Thomas tucked away a deserved goal after bouncing one off the woodwork earlier.
Scotland looked poised to walk away with a win and clean sheet, but while Gibson remarkably denied her former City team-mate Vital Kats, she could do nothing about keeping out Sommer's sensational finish.