Monster Hunter World: Iceborne - Big Bang Attack - Lynian Researcher Request

For this one, head to the Elder's Recess and grab a Gajalaka Tailraider. Then, head into any area and pick a fight with any monster.
Equip a temporal or rocksteady mantle to make sure you don't take any damage and watch the Gajalaka Tailraider closely, use the surveyors set and take a picture of the Gajalaka throwing a Meowlotov Cocktail.