Cut out a small circle at the tip of the pumpkin, big enough to comfortably fit your hand in. Using a spoon, scoop out all the center of the pumpkin. Cut out eyes and a mouth in any style you fancy, preferably resulting in the pumpkin looking unwell!
De-stone the avocados and scoop out the center into a bowl. Mush slightly with a fork, ensuring a smooth but still chunky texture. Add the onion, tomatoes, coriander, lime juice, garlic, olive oil, chilli, salt and pepper. Mix further until desired texture. Taste for further seasoning.
Place the pumpkin with the mouth facing the plate and scoop the guacamole coming out of it, vomit style. Add chips and tuck in!
For a creamier guacamole add a dollop of sour cream.