Um, one of the most challenging, uh, I faced in my last job was, uh, trying to explain and trying to solve, uh, a problem that was with engineering, which is basically a problem with reactive energy and the client didn't understand what was reactive energy. And I tried to explain to him what was reactive energy. Basically that was energy not used to produce a useful work that I told him. And he wouldn't understand that. So I told him that, like, if you have a train and a horse pulls it straightforward, it's a lot easier than if the train is pulled by a horse sideways. Cause he needs to have more force to be able to move the train and that's waste energy. So that's how I explained to them the problem.