Career day at show

Got a email from my boys teacher.

They are having career day when winter break is over and are looking for parents to come in and talk to the kids about their jobs and what they do at it.

I'm scared shitless.

I don't have a job that kids want to learn about. I manage a warehouse.

I hate talking in front of people.

What if i do this ansci have tics and outbursts. My outbursts are bad. I say some really r to x rated things at times. Other times I just yell or made sounds.

But how can I tell my boy no. He's so excited about showing off his dad.