I totally get that, I tend to have the same approach when it comes to that stuff. I had planned a few more of those types of elements that didn't make it into my own game. Strangely I was able to drop through the truck just fine in the tutorial but I had trouble on the stairs. It was probably just my brain defaulting back to the tried and true Mario style of dropping through platforms. Maybe if action was required to progress through the tutorial it would have stuck in my brain better.