Błędnie: There was a load of people, great music, awesome food- the party was extra, I'm telling you! Poprawnie: There was a load of people, great music, awesome food- the party was super, I'm telling you!
Wyraz "extra" oznacza "dodatkowy, nadliczbowy", np. If you buy this set, you'll get an extra CD free. Do opisania czegos fantastycznego, atrakcyjnego, udanego możemy użyć takich przymiotników, jak: super, superb, fantastic, etc.