Texas can be the land of crazy... but I've also found nearly everyone very helpful and accommodating in a one on one setting.
I would pop into the office and have a chat with the Principal or Vice Principal about your son constantly having a problem with this "silent 5mins" thing and see if he can possibly do something else - be excused to the office for that time period, or have a JOB like helping to pick up or SOMETHING.
We had a similar problem last year where DS was constantly getting into trouble at the same time every day (dismissal) so they started having him leave class a few minutes early and letting him hang out in the front office or the counselor's office during dismissal, then he'd go to his after school program. Everyone was very happy to help him out and it solved our problem.
Good luck! I vote just go talk to them and go in with the attitude that OF COURSE they want to help him!
Great idea , actually we've been requesting for a conference with the principal and teacher too , no reply yet for that . But i will def. bring this up , that's a great idea . Thanks !