females what is the difference between a confident guy and a forcfull guy

i wtahced this movie addicted and the guy was hitting on this female,but she said no,and just grabbed her,and started kissing her,so she eventualy gave in against her,will,the guy was a bit scary,by how much force he was using,what would you girls do if you said no,buyt the guy is half forcing you,by kissing and touchng you?