Bottom Wiper Driver Side Windsheild Wiper Flies Off The Side Of The Windsheid When They Are Turned On.?

Driver side windsheild wiper flies off the side of the windsheid when they are turned on.? - bottom wiper

I had my wipers at full speed in my 2003 Chevy Impala and began to blow the bottom plug. When I got home, she lifted the blade up about an inch from where it usually is when the next time I used my arm to go wipers all capable, and completely out of the windsheild and is completely unnecessary. Is the windshield wipers or gear drives? Can I work myself?