How shall I understand this sentence?


転びそうになった。(転んだ)

Basically, the sentence stands like this in my textbook, without further
context. The exercise instructs to read each one of the 20 sentences (of which
this is just one) and mark wether this happened around me lately or not.

Considering these search results: <http://jisho.org/search/korobi>
<http://jisho.org/search/koronda>

Maybe it means "you fell"/"you became falling"? I also can't really make sense
of the function of そうに here. I interprete it in the way of 楽しそうに遊びます (=playing
cheerfully), but I can't think of a way to implement this in meaningful way
here. Also, should ...そうになる be a set phrase, then I don't know about it or I
can't find it in my texbook.




[Sou ni natta
definition](http://ejje.weblio.jp/content/%E3%81%9D%E3%81%86%E3%81%AB%E3%81%AA%E3%81%A3%E3%81%9F)

転びそうになった。= "I almost fell."

