Why it works
6.h3 politely asks the g4-bishop a question, and 6...Qh5?? gives the flashiest answer: now the bishop is 'defended' and ...Bxf3 ruins White's kingside, right? Wrong way round: 7.hxg4! Qxh1 8.Ne2!! and the queen that grabbed the rook discovers the exit doors closing — Ng3 is coming to hit h1 and cover the escape squares, the g2-pawn holds the diagonal, and the h-file leads only back into the cage. In the line Black lashes out with 8...Nxg4, and 9.Ng3 shuts the trap for good (engine +4.5). The rook on h1 was the most expensive free rook in the Scandinavian.
Refutation
6...Bh5 keeps the pin honestly, and after 7.g4 Bg6 8.Ne5 White has space and initiative but nothing forced — the engine's −0.95 reflects Black's cramped but playable game. The pattern worth memorising is White's: a rook in the corner plus Ne2–g3 is a standing invitation for greedy queens, in the Scandinavian and everywhere else.