Sporting clays is a refreshing change from the predictability of skeet and the limited variability that the game of trap offers (44 degrees side to side, 5 set positions, 8-12 foot throw height, 16 yd line, etc).
Lipomas are benign fatty growths that do not grow quickly, but of course they must grow from somewhere, so they do grow. If a lipoma is small, does not show without touching it, and is not painful, I recommend generally leaving it alone.
Key characteristics in distinguishing a lipoma from precancerous or cancerous tumors are size. Lipomas are often small (measuring from .4 to 1.2 inches) and mobile; if the lump moves on palpation, chances are it is merely a fatty tumor. In fact, most physicians can make the diagnosis based on appearance alone.