Hey I know anger issues too. Normally I'm Ms Mellow and can walk away then take it out at home with a sledge hammer on some firewood. However there have been times .... 1. If I feel trapped 2. If I'm defending someone else and 3. If the other person won't let the subject drop. Once you loose control nothing works, so I try to keep in control.

In cases like the one you mentioned I usually go into what my kids dubbed as "sarge mode". Its usually very effective with business people. I use an assertive voice and demand to speak with a supervisor. 21 yrs in the army may have left me with PTSD but it also helped teach me how to use my voice effectively.