It's like the Ryder Gambit from the BDG, except without the Nc3/Nf6 moves interspersed.
white opening, the opposite of the Danish
It's a pre-line of the somewhat dubious Blackmar-Deimar Gambit. This line that you've come from, however, is probably not going to be seen because Black equalizes very easily, by not taking the f3 pawn, but playing e5!
Thanks for your replies. It seems like every continuation leads to poor white position and no real pitfalls for black...
I think we'll have to explore the Danish gambit as an alternative...
The key is that white has a "false" lead in development. Black can develop pieces with tempo on the queen and the somewhat undefended king and white's development really can't be exploited within one or two moves, after which, Black's pieces spring into action with various threats

You can aslo play the same idea in the more refined form 1.d4 d5 2.e4!? dxe4 3.Nc6 Nf6 4.f3 exf3 5.Nxf3(Qxf3 is still dubious), the blackmar diemer proper, which is not my personal suggestion but probably good for rough equality. Several people have tryed to claim a slight edge for black but never succeded in proving anything, even if ofter you have the definite impression the white is the one fighting for equality.
One of my students says he saw an opening on youtube that was similar to the Danish gambit, but on the opposite side of the board, with the Queen taking black's pawn after the black pawn takes 2 white pawns. Any idea of what it is? thoughts?
After that, we tried to map out other moves, but the black Q would come out, and check the white King....My student remembers white's rook gaining an open file in the center....