If he is smart he will keep his activities in the endzone. Taking a 15 yarder the 1st time out is not going to be a great way to start his relationship with Bill.
I think he will do something on the star in the endzone, to avoid a penalty or and negative attention that will end up going back to Parcells.
Think about it, how aggravated would Parcells be if he had to answer a bunch of questions about a celebration at midfield for a week. The celebration is not what would bother Parcells, as much as the media attention that will follow.