Amell knows a thing or two about cancer, as his mother is a survivor. So he began his own line of t-shirts, with all of the proceeds going to cancer research. When Sarah, a young fan battling it herself, asked him a question about his shirt line, while dressed as Arrow, Amell did something amazing. Sure, he gave her a gift - but, more importantly, he wants it back at next year's Con. He gave her a reason to fight that much harder in the coming year. Brilliant.