Client-side Game Running In Very Slow-Motion [Gameplay]

I just finished a game with Varus where I had this very unusual glitch. All animations, player movements, abilities, etc. were slowed down. This only affected my client, so all other players reported the game as feeling normal. Every few seconds, characters would teleport forward short distances so their positions on my client would match the info on the server. I took a video on my cell phone of this glitch, and I can upload it to YouTube upon request. I restarted the game several times, but the problem persisted. My ping was good throughout the game (30-40).