pentax kr internal movement???

hello pentax people. i just bought a pentax kr and very excited. this is my first dslr ever but do know the basics. something occured and wondering if its normal.
i took the body out of the box and i noticed some movement inside. for example if i face the camera pointing upwards and i move it side to side or back and forth i can hear and feel something which has a tiny bit of weight to it. is something loose? is it the image stabalizer or something?? is this normal? if not ill return it.. hope u guys can help

cheers

The sensor moves as part of the shake reduction system and you may be hearing this movement.

It's completely normal. The sensor is held in place by electromagnets around its circumference - that's how it compensates for shake. The shake reduction only kicks in at the time of capture so the rest of the time the sensor is free to move within its "cage".

thats really good to know. cheers guys