You are at the beach having a picnic with your significant other. You notice a woman struggling in the surf. You put down your wine cooler and run to her rescue. A couple of minutes into the rescue you notice that your companion is about to finish the last of the wine coolers, so you leave the sputtering victim to return to your picnic before all the wine coolers are gone.

What were your legal and moral responsibilities before you began to assist the victim? Were they the same after you began to give aid? Do the answers change depending on whether you were trained in CPR? What if you were an off-duty EMT (Emergency Medical Technician)? What other hypothetical facts might affect your analysis?