[\-size \fInumber\fP]
[\-gravity \fInumber\fP]
[\-wind \fInumber\fP]
-[\-friction \fInumber\fP]
+[\-elasticity \fInumber\fP]
[\-delay \fInumber\fP]
[\-nonrandom]
[\-no-shake]
.B \-wind \fInumber\fP
Wind. Useful values are < 0.1. Default: 0.00.
.TP 8
-.B \-friction \fInumber\fP
-Coefficient of friction (or viscosity.) Useful values are < 4. Default: 0.8.
+.B \-elasticity \fInumber\fP
+Coefficient of elasticity. Useful values are 0.2 to 1.0. Default: 0.97.
+Lower numbers make less bouncy balls.
.TP 8
.B \-delay \fInumber\fP
Per-frame delay, in microseconds. Default: 10000 (0.01 seconds.).
this software for any purpose. It is provided "as is" without express
or implied warranty.
.SH AUTHOR
-Peter Birtles and Jamie Zawinski.
+Peter Birtles, Jamie Zawinski, and Steven Barker.