talk about their mental rehearsal. they visualize flying the plane. they do a lot of visualization. when you talk about someone who prepares for something like that, they have mentally rehearsed that. when we rehearse it, our brain practices that process, and if it's just something more impulsive, the anxiety is going to be there. we see differences in breathing rate. we might see different things like sweat, because you know, you show certain signs. there's certain tells in poker, as you might say, that would show what's going on. this is a situation likely this person mentally rehearsed. he might have been feel thing way for a while, and when they had the opportunity that they rehearsed, they took advantage of that opportunity. and that may be what happened on that flight, which we may unfortunately never find out the facts. >> but possibly waiting for the moment. eric fisher, thank you for your time. we appreciate your insight on this.