There's no set normal, it's whatever is normal for YOUR baby. There's actually a movement here in the UK, a charity called Count the Kicks (pop them in google or Facebook, they have great info, they also have an app) which is trying to change health care providers mind set of telling women things like '10 kicks,' etc. If you notice a change in whatever is normal for your baby then you should head to the hospital. A decrease in movement or a sudden increase. Don't ever worry about being paranoid or looking 'silly.'
I know it's hard to tell sometimes, but if you feel something is different than get checked. It's better to be safe and get that peace of mind than to leave it too long.
Sorry, unfortunately things like this are now my world so I'm really passionate about the right info being out there.
Things like '10 movements in two hours' is just too general. For my DS that definitely would have been abnormal. He was a wiggle worm!