French superstar Kylian Mbappe has scored twice as Paris Saint-Germain beat under-fire Lyon 4-1 for their biggest success of the season so far under new coach Luis Enrique.
The glossy-looking result should not disguise the poor quality of the defending champions' rivals - PSG's first goal was a carelessly conceded penalty, two were counterattacks and the other was a goalmouth scramble.
All of PSG's goals came in the first half.
Lyon captain Corentin Tolisso had complained about his team's performance last weekend in a 0-0 draw at Nice but failed to control a pass from his own goalkeeper after four minutes and then clumsily hacked down Manuel Ugarte for a clear penalty.
Mbappe struck it cleanly down the middle past Portugal goalkeeper Anthony Lopes.
After right-back Achraf Hakimi bundled in a cross that Lyon's defence failed to deal with in the 20th minute, Marco Asensio and Mbappe finished clinically from fast breaks to put the result beyond doubt before halftime.
Mbappe's five goals puts him one ahead of Monaco striker Wissam Ben Yedder, a consistent rival for the top scorer award in recent seasons, and Nantes forward Mostafa Mohamed.
PSG remain unbeaten after four games and move above bitter rivals Marseille on goal difference into second place behind leaders Monaco.
Despite PSG's threat going forward, goalkeeper Gianluigi Donnarumma had already made four good saves by the time Tolisso's penalty reduced the arrears to 4-1 in the 74th minute.
Seven-time champions Lyon were once a serious rival for PSG but find themselves in last place with only one point.
Fans displayed a derogatory banner telling coach Laurent Blanc - formerly in charge of France and PSG - to fight harder or resign.
"The fans have a right to be disappointed - with the team, the coach, with the technical staff - given what we've offered them," Blanc said.
"But in our situation there's not just one person responsible."
An early free kick from Yusuf Yazici was enough to give sixth-placed Lille a 1-0 home win against Montpellier.
Nice got their first win, 2-0 over Strasbourg at home.
Right-back Youcef Atal openeed the scoring with a fine curling shot in first-half stoppage time, before striker Terem Moffi dinked the ball over goalkeeper Matz Sels in the 75th minute to make it two.
Toulouse conceded a goal in the sixth minute of stoppage time in a 2-2 home draw with Clermont while promoted Le Havre secured their first win of the campaign after beating Lorient 3-0.
Metz, who also went up last season, were held 2-2 by visiting Reims.