Review of Seven Thirty-Seven

One thing that I found confusing about this episode is the sequence concerning Gonzo's disposing of No-Doze's body under the stack of cars...we see him roll No-Doze under the cars, and the stack sways precariously, but then Gonzo gets up and moves what looks like an old fender against the stack to hide the body. Then we see Gonzo standing with Tuco while Tuco talks with Walter & Jessie...later, we find out that Gonzo died while the stack of cars shifted and pinned his arm, and he bled to death. But when did that happen? Wouldn't they all have witnessed it? In the next ep., Tuco seems to not even know that Gonzo was killed by the shifting stack, saying Gonzo's not returning his calls...did Gonzo go back later for some reason?

It's not really a big deal to the story line, but it left me scratching my head. Am I missing something here?