A very bright light in the sky that slows itself before speeding back up.I was out with a few friends in two different cars. We were going to another mutual friends house for a good time. our two cars pulled into our local safeway grocery store to grab some drinks. I myself walked in as did my friend who was driving me, as we were walking back to the car we realized our other friends in their car had already gone to the house. As we were pulling out of the parking lot i was looking toward the sky as i do often and i see a very bright light moving very fast then slowed and sped back up. It stayed in a straight path type direction meaning it did not change direction, for a split second i thought it was a shooting star but how it slowed and sped up again baffled me. I wasn't sure what i had just seen but i knew it was not normal. We arrive at our friends house who lives just a mile or so from the store as soon as we walk in his door our other friends were excited and asked is we saw that U.F.O.? We discussed what it could of been we mentioned a satellite, or a missile. None of them seemed logical tho it was very, very bright and how it slowed itself momentarily before zooming off again. I posted on Facebook about it and to my surprise nobody else seems to see it, i was also surprised to not see a post on here. I however thought it was worth reporting, it was very exciting to witness!