Intercultural Conundrums

How much does one tip the valet when they bring your spaceship back unscratched?

What do you do when he messes with the radio and leaves Sammy Hagar's "Marching To Mars" playing?

I think I would just give him a $5 and sing along.

Here we go marching to Mars
On a rainbow bridge
It doesn't seem so far
Steppin' into our universe
Moving towards life
To solve the problems on Earth
Everybody's marching to Mars
Gonna settle down there
Get me a house and a car
Save each other from ourselves
Poke our heads out of the sand
Sayin' Here I am
Marchin' to Mars
We're marchin' to Mars....

Thanks to roving Photojournalist ChicagoLady