1. Tommy tried to bully a 70 year old, thinking that squaring up to a pensioner would guarantee a tough prison rep
2. Tommy can't take a 70 year old
3. Tommy has revealed to a prison full of inmates that he can't take a 70 year old
Step One: Bully someone weaker than you. Show the other prisoners you're one tough guy, thus ensuring you are not a target. Yes, a 70 year old pensioner in a shower will do.
Step Two: nm