>> I am going to check the sitiuation.<< He strolls outside. The atillerist grins mockingly.
>>Yeah you do that. Just dont injure yourself.<<
This translates the meaning rough. This one is really a tough one. I needed to think about it a while to get it.
It is pretty much hardcore slang that is used, therfore not easy translated.
<<spannen>> in its slang meaning means, to get something, to understand.
>> Ich spanns schon<< = I already get it.
A more commen equivilant would be <<checken>> it is also heavy slang and has the same meaning.
>>Ich checks schon<< = I already get it.
He is basically saying that he is going to get to know the situation, in a cool way. He is carefully checking the situation.