Tony is upset because he was gearing up to make a sppech in front of the town. The occassion of the grand opening of the store had gathered most of the town, and until Lige interrupted him, he had the town's attention.
The men in town like to top each other in stories and attention-so basically Lige took away Tony's big moment.
Lige basically took away some of Tony's popularity by interrupting his speech preparation.
This could be foreshadowing of what happens to Joe later on in the story, when Janie humiliates him for always talking trash about her in front of everyone (Payback time!).