TP with an enemy?

Ive never seen or heard of this before. I was murderizing a Gnar who was in the middle of TP to another lane to escape certain deathness. He did TP, however I TPed with him... Ive attacked people before while they were TPing and this hasnt happened.

And yes, I did finish killifying him to death.

Here is the video: https://www.dropbox.com/s/va5ajcrymlkoluz/7-14_NA1-2552630838_01.webm?dl=0