Graphical glitch ?

I was doing the 100km challenge, and when I got to 100km, I wanted to see if I could land my rocket. I detached everything and was left with my capsule. I sped the whole thing up to the max because it said it would take 1.7 hours to get to the halfway mark. When it automatically went back to normal speed, this happened. I flew (mostly) straight up the whole time.