1 Martian 1: Your mammal scratched me.
2 Martian 1: I realised I need to get a sample of its venom so I can produce some antivenin.
3 Ishmael: He's a cat. He's not venomous. You've got nothing to worry about.
4 Martian 1: I hate to tell you, but this is not normal for my species. {holding one detached arm in the other}

I hope it's clear enough from the photo that the Martian is holding one detached arm in the other hand.

There's a great scene in the first episode of Futurama where Bender does a thing with his detached arms. If you've seen the show you'll know what I'm talking about. If not: https://youtu.be/v4nLrDtwBcs