Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Just wondering...

I'm used to very low powered cordless drills, so I can't really give an objective opinion; for me, this is heaven!I have one question however: is it normal that you can see sparks when you look into the back of the machine? Sometimes, I can even smell them, like on those old electric trains...Could someone please let me know ASAP by sending me an email?