dude it's not being feared by mihawk's strength it's because he know his hands will cut off he stopped that and then got ready to face him again. In that mihawk also said that you are calm but he never said anything like that and he despises people backing off just because they doesn't have strength and would say something like man what a bummer is this scaredy kid that shanks fond off? but he never said anything like that. Luffy knew mihawk is not fighting serious at all and that mihawk is not what he should with . It is only because luffy came before stage and admirals stopping him and even aokiji said the dialogue you have to cross us if you want to go to ace. How delusional you are to say that luffy is scared of mihawk's strength.