You have recently injured your leg. So, you cannot walk well with it. However, that wouldn't stop you from wanting to go out and do things. So, Swap came up with an idea. More to boost his ego than help you, but, it's the thought that counts.

"DO NOT WORRY HUMAN! THE MAGNIFICENT SANS WILL CARRY YOU ANYWHERE YOU NEED TO GO! I AM INCREDIBLY STRONG, AFTER ALL."

He said, his hand on his hip and his other hand in an excited pose. He probably wasn't lying, but, it would be a tad flustering to have him carry you absolutely everywhere.