Mason Wartman left Wall Street to start Rosa’s Fresh Pizza in Philadelphia. But this is no ordinary pizzeria. At Rosa’s, customers can do something very unique: pay forward slices of $1 pizza for those in need with Post-It Notes that hang from the walls.

Subscribe to Upworthy: www.youtube.com/subscription_center?add_user=upworthy
Visit our website: http://upworthy.com
Like us on Facebook: http://facebook.com/upworthy
Sign up for our daily email: http://upworthy.com/subscribe
Follow us on Tumblr: http://upworthy.tumblr.com
Follow us on Twitter: http://twitter.com/upworthy
Want to donate pizza or learn more? Check out Rosa's website: http://www.rosasfreshpizza.com/