"ku ku ku" doesn't sound like a laugh. But I guess in context it does.
Listen to the ringtone. Though that's prob not enough, you gotta watch the show to appreciate it. It's this huge guy in a mask and maid's uniform and it's more of a statement than a laugh...it's hard to explain.
forgive my ignorance, but if I download one of those ringtones to my phone is there a chance my phone will later receive spam from the site?
I downloaded wallpapers and ringtones from that site and created an artist account and uploaded 2 of my own ringtones. So far no spam. You can also sell ringtones there but since they're not really my creations, I just did the extracting and cutting, I'm giving them out for free.