What a nasty blow after going through the windshield. Congratulations are in order for the presence of mind to use the manual inflator to get what buoyancy could be obtained
Accidents can happen in the blink of an eye and the subjects and bystanders are generally taken completely by surprise. There was a nasty farm equipment accident some 200 yards away and the first clue to the half dozen able bodied folk, including a paramedic and a doctor, by the runway was a parade of emergency vehicles. We would have only too happy to assist in getting the machinery off the subject soonest.
There are a number of aviation life jacket types and your story raises the question of which kind you were wearing (most wisely).