You wrestle with the weight on top of you. As you do you notice that 'it' is a 'she'. Once you get a good look at her you notice she has green skin, pointed ears, and short tusks in her lower jaw, the word orc pops into your head.
The orc girl is wearing nothing but a loincloth and a belt with a hunting knife stuck in. To your relief she isn't trying to use the knife but she is trying to tie you up with a length of rope.