A regular joe has had a bad day, and the suck is gonna reproduce.
Do We Have This One??, Needs More Examples, feel free to add content or edit, since I know this can be expanded with other tropes it goes along well with. Bob hasn't had a very good day. He just got fired from his job, someone stole his hubcaps, he just got a call from the bank about his late mortgage payments, he just got a call from the phone company that the phone's getting cut, he has a hell of a bad cold and while walking to his house door he stumbles and sprains his ankle. Things just can't get any worse. He finally walks into his house, kisses his wife Alice hello, sits down on his favorite couch and relates to her the awfulness of his day. And then Alice tells him she is pregnant. Dropped A Baby On Him refers to when a bad day becomes exponentially worse with the knowledge that the character now has 9 months or less to try to save his life from irreversible misery. It's a horrifying moment, because even if his current problems are actually short term(he might get a job again soon, for example), they can now have VERY long-time consequences, since, well, there's a new mouth to feed on the way. This will always be complicated by the fact that Good Girls Avoid Abortion: even with the immense financial burden and problems it will cause them, Alice will ALWAYS insist on keeping the baby, and she(or the author) will make Bob seem an asshole if he even dares suggest it, even though it, at least practically speaking, a way to alleviate upcoming problems. Adoption's not considered either, even though it is usually more accepted socially and understandable given the situation. For this trope to be in effect, it HAS to be portrayed as distressing to the dad. After all, if the dad sees the coming baby as something to be happy about, well, it isn't very dramatic or funny. PLEASE, no Real Life examples...
And now you tell me that you're having my baby,
I'll tell you that I'm happy if you want me to
One step further and my back will break,
If my best isn't good enough
Than how can it be good enough for two?Video Games