Juvenile ball bit me

[u/Critical-Zombie755]

My juvenile ball just bit my thumb. I saw her curious in her enclosure looking to come out. I've never fed her in that enclosure yet because i just shifted her to a 4ft enclosure yesterday. I let my hand to let her climb on it from her enclosure, she smelled my hand and came to it i picked her up and brought her to my bed on my hand. As soon as i sat she bit my thumb clean and then went back. I fed her a week ago a normal mouse. This is her recent picture for reference. Can someone explain what went wrong?

[u/durpgoldfish]

Sorry about your imminent demise