What possible damage can be done

What possible damage can be done by holding the front brake down and just pinning the throttle on my outlander max xt 1000 basically making the front end act like a ski and have the rear tires pushing the whole machine. This is what was happening to my machine while my brother was riding it. I came outside from taking a nap and caught him doing this. Then my wife tells me that was not the worst of it. I said what do you mean. She said he was doing it over and over and over for like an hour.
And I mean full throttle, just throwing and turning the machine everywhere while holding down the front brake.
I was wondering what could possibly be damaged as I baby the crap out of my machine. It’s basically new but now I’m looking at it possibly being totaled out due to my brother in law flipping it ovet. And then I find out my brother did this

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What possible damage can be done

What possible damage can be done by holding the front brake down and just pinning the throttle on my outlander max xt 1000 basically making the front end act like a ski and have the rear tires pushing the whole machine. This is what was happening to my machine while my brother was riding it. I came outside from taking a nap and caught him doing this. Then my wife tells me that was not the worst of it. I said what do you mean. She said he was doing it over and over and over for like an hour.
And I mean full throttle, just throwing and turning the machine everywhere while holding down the front brake.
I was wondering what could possibly be damaged as I baby the crap out of my machine. It’s basically new but now I’m looking at it possibly being totaled out due to my brother in law flipping it ovet. And then I find out my brother did this

Sent from my iPhone using Tapatalk