Bright star like object moving erratically and zig zagging in night sky?

About 2 am me and another person saw two different star like objects move erratically, moving in a zig zag pattern. They were blinking and brighter than the other stars. I thought my eyes were playing tricks on me but we both saw the same movements at the same time. What could this be? I'm trying not to jump to conclusions, surely there is a plausible answer.