I just happened to notice as he went out the door and asked.

Not because he just happened to notice how good you were and decided to test your abilities.

Did you happen to notice another car standing in front of the house?

If you happened to notice a large red one on the road anywhere, it would be a big help.

We just happened to notice you because of the uniform.

The only thing is, you don't happen to notice me.

But only a few days ago I happened to notice something in an old picture.

Then I happened to notice the figures of the day's run.

Maybe all this stuff happens too fast for him to notice.

I wonder, did you happen to notice anyone coming or going this morning?