tara form help

[jampanman]

Hi,

I recently came across a use of the tara-form which I have not seen before;

髪の毛を切りに行ったら、すごく短くなった。

I know that to can be used to described a sequence of events, how is the above different?

Some further examples would be great.

おねがいします。

[hatch_jp]

I'm not sure the following site can help your question coz I cant fully understand what makes you confused.
Any way, I hope the following site has something to help you.
http://www.guidetojapanese.org/conditional.html#part5