In Spider-Man, Peter Parker (Tobey Maguire) starts off with his newfound superpowers not by fighting crime and saving lives, but fighting in a wrestling cage match to win some money. With his homemade costume, he fights as The Human Spider, facing off against Bonesaw McGray (portrayed by Randy Savage). He looks just a bit amateur compared to when he wears the Spider-Man costume made for him by Tony Stark.
When Peter Parker gets bit by a radioactive spider on a school field trip (don’t you hate when that happens?), he develops super strength, the ability to cling to any surface, and a spidey sense. At that point, he has no choice but to build web shooters for his wrists and call himself Spider-Man.