A Quick Bite

My younger son & I are driving down the road.  We have been to Arby's, where we both had roast beef sandwiches & bought an extra to take home to the other son.

Suddenly, out of nowhere, I become violently dizzy & have to throw up.  I pull over.

"Quick, son, I have to be sick!  Take that Arby's out of the bag & hand it to me.  HURRY!"

So, he rushes to take the Arby's out of the bag & hands me  - 

the SANDWICH!