Well, it wasn't really the masked web crawler, but it was a man dressed only in Spider-Man underwear so you can understand our confusion!

In Cincinnati, police arrested a grown man they say was vandalizing a high school while wearing only Spider-Man underwear. The suspect allegedly used rocks to break several windows at Moeller High School, then crawled in one of the windows and sprayed fire extinguishers around the building. Hamilton County sheriff's deputies arrested 23-year-old Thomas Williams, who was caught in the act and wearing only Spider-Man underwear when he was taken into custody. It must have been quite a site given that Williams stands 6-foot-5 and weighs 295. He's been charged with felony vandalism and breaking and entering.

(Source Cincinnati Enquirer)