Answer:
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
I am a seed with three letters in my name. Take away the last two and I still sound the same.
Why are there no living cats on Mars?
Searing 'cross the pitch-black skies I scream in celebration Yet moments later my outburst through I am naught but imagination.
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
The answer I give is yes, but what I mean is no. What was the question?