I type too fast and when my brain is faster then my hands I just hit random keys. a weird qirk I HVE is I mix words up- or I say a word wrong 50 times when I know the actually word and its pronunciation- it just wont come out, also after I'm done saying something,- I subconsciously move my lips and repeat the sentence very sudly. I nevr knew I did this till my sister asked why I did. I used to resay the sentence in my head to make sure I was coherent as a child so it a weird muscle memory