Hi<br/><br/>A woman and a man were following another guy.<br/><br/>However that guy escaped them.<br/><br/>The woman says: We drive and we watch. And with any luck we'll pick up his trail again.<br/><br/>The man says: I don't think I'm that lucky.<br/><br/>She says: I am<br/><br/>He asks: Why?<br/><br/>She replies: I'm Irish. We always <b>keep some reserve in the tank.</b><br/><br/>What is that supposed to mean?