now, the next step will be to do an angioplasty and stent insertion. >> these wires aren't going into the actor, tom, but into a computer simulator. >> that's really fiddly. you've got to have good eyesight, i think, because everything is very thin and flimsy. so, what's it like actually teaching in a simulated environment like this? >> i mean, it is important, i think, for juniors to have training in a simulated environment, because it's a safe environment, and they are not under pressure, and i have time as a trainer to teach juniors in a very systematic methodical manner. they can actually review what they have done today, and they can record and reflect. and the most important thing, they can rehearse the procedure many times in a day. >> it would probably take me years to be in a position to be able to do what i've done today. and--and certainly i feel as though now i've practiced it, you know, a good few times. i certainly feel more prepared, uh, if i actually have the opportunity to go and do this for real. >> well, i'm certainly not at that stage where i can do something like