Logan shrugged. "I can tell when people are lying, so I'll know if you're bullshitting me. Problem comes with you believing mine ... though I have one I can prove. Might make you more inclined to believe the others."
The Doc and Ianto weren't the only ones that thought this was funny. Logan did too. But oh well.
"Might as well start. A while back I got nabbed by some nasty types on my world that wanted to create a living superweapon. Among other shit they did, they split me open and coated my bones with metal ... and gave me metal claws to go with." And he popped a claw.