Few will believe that a hardcore practical and materialistic person like you is capable of sensitivity and genuine emotions. You project a hard exterior but are actually very sensitive, a trait you successfully hide from others.
You can be seething with anger, but will not betray your feelings. But then, there are times that even you cannot control your temper.
Under such circumstances you can shout and scream, more with frustration at the situation than with anger at any particular person. Your outbursts can shock others and can make them feel guilty too.