Here's why:
* Fused Sentence: This occurs when two independent clauses (complete sentences) are joined together without proper punctuation or a conjunction. In this case, "Tracy rides bulls rodeos" and "he's really good" are both complete sentences, but they are stuck together without a comma or conjunction.
Let's fix it:
* Corrected: Tracy rides bulls at rodeos, and he's really good. (We added a comma and the conjunction "and" to separate the clauses correctly).