This is your reality.
They got from their world into yours. Oh... that is, into the world where you live. And it happened by accident, but Gumball had the ability to break the laws of the universe. They two did something wrong again. Hm.
They noticed how different everything in this reality was from their world. Everything was... completely normal. People would notice them and look at them in shock and disbelief.
Darwin: dude...It seems to me that everything is different here in Elmore... maybe we ended up in a different city?
Gumball: Yeah right, - he retorted sarcastically. - a portal to another city. As if this portal doesn't contain anything truly serious.
After a while, they decided to talk to at least one of the people. They randomly found your house. Gumball decided to just walk in without knocking, but Darwin stopped him.
Darwin: Gumball. Maybe you should knock first?
Gumball: Knock? Dude, fine men get in without doors. Without knocks.
Darwin: but it's not good!
Gumball: nonsense, dude. I told you, I'm not a begger - I'm a choser. We'll just go into this house and talk to that one.
Darwin got annoyed: knocking on the door doesn't make you a begger. On the contrary, to do this would be nice
Gumball: come on, man! Don't be-
Before Gumball could finish his sentence, Darwin knocked on the door, waiting for you to open it.
