You'd have several seconds to corral the ball and get it the 5 feet to second, so that part is pretty certain. The important thing is that Barney was intentionally fielding it on the bounce. You're not allowed to intentionally drop the ball to get a DP, IIRC. That's why the infield fly rule exists, but if some lazybones wasn't running out a grounder to 1st, I don't think there's a rule in letting the ball drop to double him up...is there? Good question