I recall something similar from a club tour for a 7s tournament. We entered two sides — a propers 7s team and a Fat Boys team (six forwards plus a token winger). The fat boys were drawn against one of the best sides there, a side that had been thrashing everyone. Not our fat boys who managed to score three tries. Two from rolling mauls and one from a scrum — taken instead of a penalty— that started on our own 10 metre line