Much of the responses I've gotten--and by towards those who have raised the exact same point I did--either involve trying to explain away how Spidey could have gotten into a locked car before the carjacker broke into, that this "just a movie" that requires suspension of disbelief, or that one is just looking for something to criticize about the film. Earlier, you provided the following defense:
To give you credit, it is safe to assume that Spidey knows the guy is a car thief beforehand and that he saw him breaking into the car, hence his "don't dress like a car thief" line. That's what the film is telling us. However, lets assume that you are also correct in that Spidey got in before the valet locked the car and waited for the carjacker to break in. There are two big problem with that this raises. One--how does the valet not notice a guy in a brightly colored red-and-blue suit getting into the back seat of the car? And two--if Spidey got into the car before the carjacker broke into it, then how Spidey even know that this specific car was the one the carjacker was going to rob beforehand? Even if he suspected the guy of being a car thief based solely how suspicious he looked, how did he even know the car thief would attempt to steal that very car?
This is the last ill speak on the subject for everyone's sanity. especially considering both of your "big problems" have already been addressed (you're really gonna ignore whatever you can to continue this argument, huh?) and that the answers are extremely easy to imagine. It seems you are purposefully NOT thinking about what you're complaining about (never mind actually reading people's responses and watching the clips).
As for spidey getting in the car without the valet noticing, there are numerous ways they could show it, one example being that spidey hops in the car as the owner is walking towards the valet to hand the keys ove, so neither are looking at the car and that the car door noise would be considered normal considering it's a valet, as well as in the middle of a city full of sounds...if he was quiet about it, it could certainly be lost in the noises of the surrounding location. That's just one example, but of course there are several other options. The point is that spidey is known for being quick, silent and sneaky. Far less superpowered heroes (among other movie characters) have been shown to be even more sneaky than this, and no one bats an eye. It's stupid (yes, stupid) to think spidey couldn't sneak into the back seat of a car at night while someone isn't looking or paying attention.
As far as spidey knowing which car the theif would go after, again, super easy: Spidey simply sees that the theif has his eye on the car, in a similar way that a burglar scopes out a house, the theif is paying attention to the vehicle and driver, drooling over it, etc before heading out to hide in the parking lot.
Obviously, these are just ideas and assumptions based on the clip. The fact remains that it is a clip - a small scene of the movie that does not include anything leading up to and following it. To damn the movie for not showing more of the clip is pretty much the same thing as damning michaelangelo after only seeing a postage size stamp of the cistine chapel. It's stupid.
And yes, I'm done. I've degraded myself enough partaking in this argument. How bout dat spidey movie?!