wow
Have you ever played King's Gambit Accepted Tumbleweed?

Looks like Correspondance Chess. How far was this book?
This was a 3-day move chess.com tournament.

You sacrafice a pawn for rapid development and then you move your king seems silly to me.
Yes it was first silly to me too. I found two games with this silly king move in the database so I tried to apply this line. The king is like a drunk :)
First game was played between Fort J. and Campbell William in 1913:
Second game was played between Howe H. and Beers W. in 1940:

This is probably the worst idea since portable tombstones
ROFL :D that was too funny to pass-by unmentioned!

This is probably the worst idea since portable tombstones, yet it has it's followers. After 3.Kf2, black's best is probably 3...d5, or some other simple developing move. White is down a pawn and can no longer castle, so black should be at an advantage. Still, this is somewhat similar to the Steinitz Gambit (1.e4 e5 2.f4 exf4 3.d4), which turns up now and then in master level play. One blitz game I played went:
Your opponent did a mistake with exd5 because it's a blunder in that line. The proper continuation would be Qf3.

I think black should continue of his simple developments instead of attacking the white's king. I believe this was the main idea in this variation. White gives an ostensible exposed king to black but premature attack by black generally causes an underdevelopment or unbalanced bad position for him.
This is probably the worst idea since portable tombstones, yet it has it's followers. After 3.Kf2, black's best is probably 3...d5, or some other simple developing move. White is down a pawn and can no longer castle, so black should be at an advantage. Still, this is somewhat similar to the Steinitz Gambit (1.e4 e5 2.f4 exf4 3.d4), which turns up now and then in master level play. One blitz game I played went:
Your opponent did a mistake with exd5 because it's a blunder in that line. The proper continuation would be Qf3.
4.Qf3 is probably even worse than 4.exd5. Black can just play, for example, 4...Bc5+ and if 5.Ke1 simply play 5...Qh4+.

Holy moly, I read this article, tried it out and won my first game.
I put the position in my en
gine and it said by move 9 I was even.

Holy moly, I read this article, tried it out and won my first game.
I put the position in my en
gine and it said by move 9 I was even.
Congrats! :))

This can't be better than the Bongcloud.
:D) Bongcloud is hopeless man! It starts with blocking both queen and bishop so I wouldn't give it a chance. Only for "just for fun" games.
If black cooperates, you get some advanced development with open lines and a black queen to terrorize, which is nice. But if black doesn't cooperate, then you missed a move of development and instead stuck you king on the half-open file you would have preferred to have a rook on.
It certainly is fun to play, probably better than it looks, but mentally it was hard for me to justify playing it because of what I stated above.

Tumbleweed? Looks like a way to obtain a lost position in 3 moves. What does white do after the simple 3...Nf6 4.Nc3 d5?

Tumbleweed? Looks like a way to obtain a lost position in 3 moves. What does white do after the simple 3...Nf6 4.Nc3 d5?
If Black chose to make a simple development, White continues his own simple development. If d5 played by Black, white should not take it and develop one of his minor pieces instead.
This opening looks like a gamble than a gambit at first glance. However, it gives white very interesting attacking lines. It's generally not recommended against a very high rated player. Especially in the games which are not blitz. I dared myself to use this opening in a 3 day move tournament and here is one of the games that I played successfully.
I think it is better to play this opening only at blitz games.