the door story

Well, let’s talk about the door today. This is the spinning door that’s located at the ground floor of my company’s building. I guess this type of door is pretty common in Melbourne, particularly city. But then, there is always a problem with everything. This door, will automatically be in a “standby” mode after some times when noone else is passing through it. So, being in a stand by mode, the spinning speed will slow down to very slow… there is a sensor attached on each side to sense if anybody’s coming close and the spinning speed will increase to normal again.
Now the fun part is, the sensor on the outside of the door apparently is not working very well. So when you are entering the building, the door is still spinning like a tortoise crawling in a circle and in the end it took you about 4-5 second just to cross the door. The funnier part is, just as soon as you step out of the door, you trigger the sensor inside and the door start spinning normally then. So, when you step off, you just have to move quickly enough to avoid being hit by this master piece… so the question is, why can't they just put a normal door there? its quicker, safer and more environmental friendly as they use less energy? no idea...