Laz couldn't fly and neither could the giant. But due to the giant's size, Laz had no choice but to jump at him. Again and again Laz launched himself at the large man and struck forward, meeting fist against fist. Sadly though, it was Laz who was sent flying again and again. No matter how strong Laz was, the giant's weight wasn't something he could fight against.
After a few moments of this reckless battle, Laz stopped jumping at the bronze giant. He knew he wasn't going to get anywhere and that wasn't really the point. The giant wasn't stronger than Laz per say, but his large size and weight gave him an obvious advantage. The only reason Laz was being so reckless from the get go was to accurately gage the giant's speed, strength flexibility.