The actual attack cues
Bigfoot has 30 base HP and 1 DEF. Stomp hits twice and can apply Small. Spin Slam rises high before hitting the whole party. For Vine Swing, watch all four passes: the second and third arrive close together, while the other gaps are longer.
React to Small and the charge
Small reduces your offensive value, so check your status before spending an expensive attack. Bigfoot Anger is the charge cue for Stomp Fury. Plan protection around that stronger follow-up rather than assuming the next move is the ordinary two-stomp animation.
Do not copy a mango-projectile phase
The tree starts the encounter; the documented combat moves are Stomp, Spin Slam, Vine Swing, Bigfoot Anger and Stomp Fury. A mango-throw or low-health tree-stomp phase is not part of this moveset.