NEVER APPROACH KANYE WEST WITH A PEN -- especially if he's wearing a fancy sweater -- because after Yeezy's reaction in Paris this evening, you might as well be waving a knife in his face.
Kanye was leaving dinner moments ago when an autograph seeker asked the rapper for some love -- holding out a pen ... and a sneaker to sign.
The pen came within inches of Kanye's pristine white sweater -- and Yeezy nearly lost it.
You gotta see it. Ye's reaction is almost worth as much as his threads.