The context of the following conversation is Tracy had been hearing gnawing sounds and seeing droppings. Tracy was able to catch the mouse responsible by using some cheese.:
Tracy says I finally found out what was going on at my place!.
The friend responds What happened, what was it?.
Tracy responds I caught a mouse that was the responsible for the gnawing sounds..
The friend responds How did you catch the mouse? The little ones are fast!.
Tracy responds I used some cheese and caught it easily..
The friend responds I am glad you caught it, now you can relax!.