nostr:npub1v7t4yx9vxtv3mat0hdsduuym4fvjd5dzmdlh82ssa40phr965h2s2lck6k dont worry too much about that. just don't send a shower of sparks onto your carpet or anything highly flammable like open containers of gasoline, piles of dust, etc. it will burn clothes. i wear a cotton apron when grinding. 

it's a good to set up a work area. if you have a garage or anywhere with a concrete floor that is preferable. the sparks and flying metal will damage stuff