Absolutely a flop. Tight end looks to have about 6inches and probably close to 30lbs on him. Still dumb to react though, they always catch the retaliation.
Eh he turned his back on him and got hit in the back of the head. I'm sure he didn't do a lot to try to keep his feet, but I don't think he threw himself down or anything.
But it should have been double personal fouls.
EDIT: Another thing it did was stop the clock, allowing Indy to set up on the hash Blankenship wants with the extra timeout. They would have had to use their 3rd on the long completion otherwise.