LoL, guessing a trick from a still picture? There's so many things it could be. Normally I would guess it's most likely an Indy Tantrum or Indy Tantrum to Blind since those seem to be very common Indy tricks. However, after just taking a quick 30-second glance at a video of Nicola's riding it looks very much like it could be her Indy Scarecrow. Just my uneducated guess.