True story: I saw a ghost dinosaur when I was a kid

It was 1976, around 12:30 in the afternoon of a bright Summer day. My brother and I were playing in a vacant lot. All of a sudden his face turned white as a sheet and he was looking in the direction of a nearby apartment building. I turned to see what he was looking at and saw it clear as day: a dinosaur, sort of like a T-Rex but neither my brother or I recalled seeing any arms. It was nearly the height of the two-story building, moving slowly and looking down, almost like a bird does when looking for bugs in the grass. It was grayish-red in color and it was transparent, like a ghost. We watched it for a good 10 seconds before it disappeared behind the building. For some reason, we were so upset by it, we cried when we told our parents what we saw. This convinced them that we saw something.

Through the years, we've talked about what we saw on that long ago Summer day and we still have no idea. A portal to another time? A hallucination? The shadow of a tree given monstrous life by our overactive imaginations?

We both agree though, it looked nothing like the T-Rex in Jurassic Park.