[SimonandSyril]

It is normal if you are hearing a kind of loud buzz when something scared them (they can scare themselves by falling off things or moving things suddenly). This does sound basic and I am sure you are doing this but are you feeding enough? Try looking into your species and how much you should be feeding and how often. Also, keep in mind handling isn't for all hamsters but don't give up try all the taming methods you can find. Patience is key when taming misbehaved hamsters