Munchie hasn't been himself the past few days. On Tuesday, when I was home for lunch, he was totally normal. Then when I got home from work, about 2 and a half hours later, he was sitting on the rug in the bathroom. A little weird, but I didnt think much of it. A couple of hours later, he was still there. I tried to get him to come out, but he wasn't having it.

He keeps looking around as if something is going to get him. If he even walks around at all, he does so with extreme caution. He jumps at every movement and sound. He will play if I bring him a toy and he is currently investigating what goodies he can knock off my nightstand, but he's definitely not normal.

What on earth could have happened in two hours that made this formerly hyperactive, happy go lucky boy turn into a big scaredy cat who dosen't want to move? The girls seem fine. I'm very concerned about him and I'm leaving for vacation on Saturday. Should I cancel my plans and take him to the vet?

Edit: I should mention that a lot of people have been setting off fireworks lately because of the holiday. However, they've been doing it for at least a week and he only started this behavior on Tuesday afternoon.