Happens to me all the time too. So every time it happened, I would try to conciously say "if I ever see that again, it's a dreamsign".

But, but brain likes to play tricks and rarely do I see the same things/people again. Even in my dreams I pick out dreamsigns but they don't snap me into it.

For example, last night I dreamt I was at a lake. My buddy was going to go wakeboarding behind a boat. He was starting on the shore and what was pulling him? A pickup with a boat on a trailer behind it!

I said to my other buddy in my dream "That will never work! Oh man, that guy is stupid!" HE took off, the truck sank and the boat floated on the trailer... lol. The guy boarding was pissed because he didn't get going fast enough.

Then we walk over under some trees to the "swimming area" near the lake. The ground was weird, like little puff balls on the ground. I'd walk on them and spores/pollen would shoot up. They were everywhere, so it was hard to avoid. A DC tells me "yep, lots of pollen." I say "That's gonna suck for my allergies!"

Two wacky things in a dream. But I guess not wacky enough to snap me into lucidity. lol