Independence Day in the A.Z.

Shannon read this strip and said she didn't think it really made sense because she doesn't see a connection between Mexico and firecrackers. I don't know, but when I see Mexico in my mind, I think of firecrackers almost going hand-in-hand with pinatas during celebrations, and being a staple of the culture. Am I wrong, am I making this up?

PS I decided to post this strip regardless of whether or not it makes sense based on the fact that it wouldn't be the first time I posted something that was unfunny or nonsensical.