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From: rsmith.pa@XEROX.ARPA
Newsgroups: net.physics
Subject: Re: Helium baloon in car
Message-ID: <12146@sri-arpa.UUCP>
Date: Tue, 18-Sep-84 12:47:23 EDT
Article-I.D.: sri-arpa.12146
Posted: Tue Sep 18 12:47:23 1984
Date-Received: Thu, 27-Sep-84 03:42:36 EDT
Lines: 12

Wait a minute!! 

I meant to say in the halium baloon fuzzy dice comment:

The mass is less so the acceleration is GREATER, so the velocity vector
is bent MORE, and the baloon turns to left QUICKER than the surrounding
air.

My original remarks still apply for Helium 9875, a extreemly rare but
very heavy isotope of this element. 

You have to drive the car pretty fast to avoid fallout problems.