Ah... a bit of both.

[Billy shifts a hand to rest against his side, offering up a reluctant smile.]

I took a hit yesterday - ripped my suit - and... I guess I ran out of magic getting myself back to the ship without exploding or something. Whatever happens to you in space without a suit. I passed out, and I haven't been able to cast a spell since.

[His hands twist together again, wincing.]

I tried to heal you, but I couldn't... I couldn't do anything. Sorry.