“I...” Wolfgang opens and closes their mouth, then purses their lips. It's not like they're trying to avoid the question this time so much as genuinely unsure what to say. Or hesitant about it.
“It's magic. I guess.” They look away, expecting to be scoffed at, because people who see them doing things with their own eyes don't accept that as an explanation. There's a clear and obvious explanation behind why some human beings can fly or make fire out of nothing or walk through walls. Not so for whatever this is.