Why is my Robo hamster doing this?

I have had my robo hamster for 3 days now and on the first 2 days she seemed very happy in her new home. Now, today on the thrid day she is constantly biting me when i let her sniff me and she just started running extremely fast in her wheel and its like she stops running on purpose and lets herself just going around and around in the wheel and then she hits her head on the wheel. It seems like she is trying to harm herself...Are these normal behaviors?|||robo means robot your hampster is a robot|||those people that answered you are very stupid! i have 6 robos and work at petsmart i know lots about them i am constantly researching them to know more ...as far as the running on the wheel and flipping is concerned that is perfectly normal its cuz they are the fastest little hamsters not a problem mine do it all the time... but the fact that your robo bites is so unheard of!...are you mostly positive its a robo hamster? they dont even bite when they are pissed off or scared...make sure its a robo cux saing it bites doesnt sound like one and if it is then something could be very wrong with her and i suggest taking her to the vet asap!|||the running on the wheel really fast is normal and so ie the biting dwarf hammys are smaller then hammys so imagining yourself as a small thing and a huge hand is trying to grab you whould you be freaking out this video will help you http://www.youtube.com/watch?v=jWRV_21mX鈥?/a> hoped i helped =)|||I've never met a Robo hamster that didnt bite. They are VERY aggressive I'm a Pet Care Specialist at Petsmart and i care for the animals.