My mom would totally understand where you're coming from. My brother and I were both a little on the care-less side. I remember when I broke my elbow, almost a year to the day from when I broke my wrist, I went into the house, told my mom I think we need to go to the emergency room, and she just looks at me. Why? She's all are you bleeding: NO, did you get knocked unconcious: NO, did you break a bone: No and I'm like, well I believe I may have broken my elbow. Low and behold, she was right, it wasn't broken, it was SHATTERED! Completely shattered! She just looks at me and rolls her eyes. She's like I can't believe you didn't cry or scream. So we get that recovered and almost a year later to the elbow issue, I come home and say we need to go to the emergency room and she says why this time: I just regained consciousness, I knocked my self out roller skating. I hit my head on the concrete and I have a headache. So we go and at least this time I didn't break anything, jsut a concussion! (Of course this isn't all of the damage I've done to myself, the list goes on!!!)
So my mom would seriously sympathize with you. And of course my brother did some hum-dingers as well!
He'll get through it. He'll be ok. He sounds a lot like me, and he'll be back on the slopes before he knows it! He just has to believe it. He may have to go through some mega rehab, but he'll get there! It will turn out just fine!
I now can predict the rain though! He may have that to look forward to!