This week's Bulls N' Bears ASX Runners of the Week is… Yandal Resources, after the company identified a gold discovery of potentially massive scale in one of WA's prolific gold belts. Imagion shot up on positive talks with the US FDA on its Phase 2 breast cancer imaging technology, Falcon intercepted some of the highest grade gold in Australian drilling this year and Bayan scooped up a strategic rare earths project next to the world-class Mountain Pass mine.