I was solving puzzles and I failed this one.
The correct answer was
fxe4 fxe4 Bxh5+.
Why can the knight not just move to
f6 and be safe there?
fxe4 Nf6 exd5 fxd5 is in my opinion more preferable for black.
[Title "1...Nf6?"] [fen "rnbqk2r/ppp3pp/3b4/3p1p1n/3Pp3/1P2PPP1/P1P1B2P/RNBQK1NR w KQkq - 0 1"]