Idea: Vendors that roam around the stands at a summer baseball game (or at other summer events) carrying a fan and a large battery (to power the fan) in a backpack that charge people money to cool them down. Also: brainstorming names for the business (Mr. Blow, etc.), the vendors ("Joe Blow", etc.), and things the vendors say ("get your fan jobs here..."); the risk of accidentally blowing sweat onto nearby people; questioning whether global warming will make summer sports like baseball die off because it's just too hot out