Here is another one... Not as classic as my first one but hashgacha pratis..
You know how kids are curious & come sneaking down the stairs to peek whats going on.. One time I was meeting this girl for the first time & her siblings start coming down the stairs quietly smiling & trying to hold back laughter.. kids acting like kids.. she realized them & starting screaming go back upstairs!! THANK GOD THAT HAPPENED! (I am thinking.. get me out of here) Because later on a few years later I was speaking to a friend of mine whos brother got engaged to her & he mentioned that they dropped the shidduch & she ended up going totally off the religious path.. completely.. became some model for pictures/companies etc.
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One more, this about my great grandfather who grew up in Vienna.. One time he went up to an. apt where a shidduch was mentioned (pre war) and he hears SCREAMING coming out of that apt.. fighting etc... So he didnt know what to do.. Knock in.. wait...
anyways after a while he knocks in & gets a big shalom aleichem like nothing was going on... since then he felt he couldnt trust anyone.