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I was walking on/down/along/up the lane when the boy, who were running fast towards me, crashed into me.
I walked out of the room, slamming the door, when I got annoyed by my boss reprimandation.
She just walked/went into the room and locked the door.

Please correct my sentences and provide me with better versions.

Moreover, I wonder if "walk down" is more common or "walk along" in a colloquial language. Also, I confuse when to use "up" i.e. walk up because I can hardly think of any context where "up" can be used.
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I was walking down/along/up the lane when a boy who was running fast towards me crashed into me.

I walked out of the room and slammed the door when I got annoyed by my boss's reprimand.
She just walked/went into the room and locked the door.

Moreover, I wonder if "walk down" is more common or "walk along" in a colloquial language. Also, I confuse when to use "up" i.e. walk up because I can hardly think of any context where "up" can be used.-- They can all be used any time except when there is a perceivable hill, in which case it is 'up' in the ascending direction and 'down' in the descending direction.
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We also use "walk up" to mean to approach something/someone, maybe with the meaning of doing so with with confidence.

Just walk up to her and say hello. She won't bite you.

I'm going to walk up there and give the best speech you've ever heard (even if there are butterflies in my stomach).