Macbook Pro Retina Speaker-Phone Glitch

Hi all,

I've recently noticed that when I place my phone against my mac's speaker, it will randomly lock.

also sometimes my phone's screen will go mental

It's an incredibly disturbing glitch/bug and i'm not sure why it happens, i have scoured the internet for a reason but it looks as if i'm the only one, or the only one curious about it.

Thanks.