[DownTownTonyBrown]

NFHS rules 2-9-1 excerpts

A catch is the act of fielder in getting secure possession in his hand or glove of a live ball in flight and firmly holding it, ... The catch of a fly ball by a fielder is not completed until the continuing actio of the catch is completed. A fielder who catches a ball and then runs into a wall or another player and drops the ball has not made a catch. A fielder, at full speed, who cathces a ball and whose initial momentum carries him several more yards after which the ball drops from his glove has not made a catch. When the fielder, by his action of stopping, removing the ballfrom his glove, etc., signifies the initial action is completed and then drops the ball, will be judged to have made the catch.

Some excerpts form the casebook 2.9.1A
Attempts to regain balance after receiving [the] ball are considered a part of the act of catching; and if the fielder does not come up with the ballin his possession, it is not considered a catch. In all such cases, judgement is a factor. If the ball is clearly in the fielder's possession and if some other new movement not related to the catch is then made, and if the ball is fumbled during such new movement, the upmpire will declare it a catch followed by a fumble.

Jerry, in your case the speed with which he was moving allowed him to make the catch but it also caused him to crash into the wall and the crash is therefore part of the catch.

2.9.1C
...it is a legal catch if an umpire rules that the ball was dropped as the fielder voluntarily removed the ball from the glove.