I'm going to walk out during service at a busy time
Why do you want to do that?
I hate when things are so busy and people keep coming I get stressed out.
It is wrong to leave in the middle of service when there are others in need. It is better to stay home if you don't want to be there.
My co-workers should be able to handle it. If they can't then they shouldn't work there.
You shouldn't work there is you're not a good co-worker. You want to leave them in their time of need and obviously you don't like your job. You should quit if you have this attitude.