Gym Rat 

"Gym Rat" is a humorous oil painting by Lucia Heffernan. It depicts a small mouse wearing boxing gloves, poised to strike a red punching bag that has an image of a menacing cat drawn on it. The scene is rendered in a realistic style with rich details and a playful tone. The mouse, despite its size, exudes confidence and determination, creating a whimsical juxtaposition between its small stature and its powerful pose. The artwork's humor lies in the unlikely scenario and the contrasting imagery of the mouse and the cat.