I use features

What I tried to say:

"Greek place"

What I ended up saying:

"Breek ... errr..."

What this means:

The initial consonant of word 2 lent it's [place] feature to the initial consonant of word 1; BUT, word 1 kept it's [voicing] feature intact. Thus, /g/ -> /b/

Looks like I do use something like a feature after all :) 

Moral: pay close attention to your slips of the tongue and other speech errors...

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UPDATE

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Chris K swaps features between the onset and the coda of a single syllable - 

"wis.dom" -> "wis.bon"

by swapping the onset [+alveolar] with the coda [+bilabial]; leaving the rest intact...

Medal and honors to her.