Do you guys also always feel like you are walking on eggshells at work or is it just me and my job?

I work at a job were you have to meet quality and have a monthly review and if you fail three months in a row you are out the door. They do the firing so tacky as I like to describe it. They will call the person to the back and then the managers will clear out there cubicle with a box and you never see that person again. Everyone is forced to watch this then get back to work. Its allot of pressure on myself and my co-workers seeing this happen all day everyday. With the economy as it is I think companies know they can treat us like crap and we have to take it. Is it normal to go to work nervous, stressed and heart beating fast every single day from when you walk in until you walk out? That is how my life has been.