The 29-year-old put the Bianconeri ahead after 11 minutes, but barely 60 seconds later he was shown a second yellow card and received his marching orders.
"For a moment after the goal I didn't understand anything," Iaquinta explained. "A lot of it was because I wanted to party under the curva with our fans.
"The Juve supporters were there to encourage me when people spoke of me going away, so I dedicated my goal to them."
Iaquinta was initially booked for taking off his shirt while celebrating. He then lunged into a tackle from behind and saw yellow again.
"That tackle was not worthy of a yellow," Iaquinta insisted. "I did go in a little hard. I was furious like never before because I was forced to leave the field after little over 10 minutes.
"What a pain. I first thought about not watching the game. Then I popped myself in front of the TV and watched my goal it made the red card a little less bitter."