Dear All,<br/><br/>Do these sentences sound natural enough to you?<br/><ul><li>(on the phone)<b> A: What time will you be here? B: Well, if the cabby steps on (it???) I should get there in 5 minutes.</b></li><li>(on the phone)<b> A: What time will you be here? B: Well, if the cabby finally decides to step on (it???) then I'll be there in 5 minutes.</b></li></ul>Would you change anything? Are both of them equally fine? Is there any difference in meaning between them?<br/><br/>Thanks