Grummy knows this, but I thought the rest of you should find out.

Our government is so protective of us, that they required dozens, no
hundreds, of warning placards on airplanes, especially homebuilts.
This list comes from a post a few years back on rah.

The proliferation of required placards that festoon every flat surface
in
our airplanes may increase in number if a number of concerned
physicists get
their way.

For example...

WARNING: This Aircraft Warps Space and Time in Its Vicinity.

WARNING: This Aircraft Attracts Every Other Aircraft in the Universe,
with a
Force Proportional to the Product of the Masses and Inversely
Proportional
to the Distance Between Them.

CAUTION: The Mass of This Aircraft Contains the Energy Equivalent of
85
Million Tons of TNT per Net Ounce of Weight.

HANDLE WITH EXTREME CARE: This Aircraft Contains Minute Electrically
Charged
Particles Moving at Velocities in Excess of Five Hundred Million Miles
Per
Hour.

CONSUMER NOTICE: Because of the "Uncertainty Principle," It Is
Impossible
for the Anyone to Find Out at the Same Time Both Precisely Where This
Aircraft Is and How Fast It Is Moving.

ADVISORY: There is an Extremely Small but Nonzero Chance That, Through
a
Process Know as "Tunneling," This Aircraft May Spontaneously Disappear
from
Its Present Location and Reappear at Any Random Place in the Universe,
Including a Neighboring Country.

READ THIS BEFORE OPERATING AIRCRAFT: According to Certain Suggested
Versions
of the Grand Unified Theory, the Primary Particles Constituting this
Aircraft May Decay to Nothingness Within the Next Four Hundred Million
Years.

THIS IS A 100% MATTER AIRCRAFT: In the Unlikely Event That This
aircraft
Should Contact Antimatter in Any Form, a Catastrophic Explosion Will
Result.

PUBLIC NOTICE AS REQUIRED BY LAW: Any Use of This Aircraft, in Any
Manner
Whatsoever, Will Increase the Amount of Disorder in the Universe. The
Owner/Operator Is Warned That This Process Will Ultimately Lead to the
Heat
Death of the Universe.

NOTE: The Most Fundamental Particles in This Aircraft Are Held
Together by a
"Gluing" Force About Which Little is Currently Known and Whose
Adhesive
Power Can Therefore Not Be Permanently Guaranteed.

ATTENTION: Despite Any Other Listing of Aircraft Structural Materials
Found
Hereon, the Owner/Operator is Advised That, in Actuality, This
Aircraft
Consists Of 99.9999999999% Empty Space.

NEW GRAND UNIFIED THEORY DISCLAIMER: The Manufacturer May Technically
Be
Entitled to Claim That This Aircraft Is Ten- Dimensional. However, the
Pilot
Is Reminded That This Confers No Legal Rights Above and Beyond Those
Applicable to Three-Dimensional Objects, Since the Seven New
Dimensions Are
"Rolled Up" into Such a Small "Area" That They Cannot Be Detected.

PLEASE NOTE: Some Quantum Physics Theories Suggest That When This
Aircraft
Is Not Directly Being Observed, It May Cease to Exist or Will Exist
Only in
a Vague and Undetermined State.

COMPONENT EQUIVALENCY NOTICE: The Subatomic Particles (Electrons,
Protons,
etc.) Comprising This Aircraft Are Exactly the Same in Every
Measurable
Respect as Those Used in the Aircraft of Other Manufacturers, and No
Claim
to the Contrary May Legitimately Be Expressed or Implied.

HEALTH WARNING: Care Should Be Taken When Piloting This Aircraft,
Since Its
Mass, and Thus Its Weight, Is Dependent on Its Velocity Relative to
the
Observer.

IMPORTANT NOTICE: The Entire Physical Universe, Including This
Aircraft, May
One Day Collapse Back into an Infinitesimally Small Space. Should
Another
Universe Subsequently Re-emerge, the Existence of This Aircraft in
That
Universe Cannot Be Guaranteed.