What would be a good attack to demonstrate that is relevant to cloud computing?

Hi to all,

I'm talking about cloud computing plus its vast benefits in a presentation and I just want to alert the audience about its risks by an actual attack using kali linux or kali nethunter. What would be a good attack to do this? Of course, I have to make sure the target machine is vulnerable to this attack I choose. I think metasploitable machines will help me here.

Thanks.