Tf2 weird glitch

[XXsAnCt1F13DxX]

Hey guys this glitch or bug or whatever it is has been happening to me for a long time and well I recorded this and you will see for yourself... its the thing near the end with the screenshots and I dont know why the screenshot thingy it keeps happening.
Its at the end of the video.

 

[XXsAnCt1F13DxX]

Help please.

 

[KillerZebra]

never happened to me before. idk maybe ur key bindings or something

 

[flanky]

I'm paying more attention to the pony music, oops :S