how do “do not walk on the grass” signs get there?

Question: how do "do not walk on the grass" signs get there?

Pete Edwards answered on 17 Jun 2010:

Hovercraft maybe?

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Stephen Curry answered on 17 Jun 2010:

Illegally.

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Tom Hartley answered on 17 Jun 2010:

There’s always someone special to whom the rules don’t apply, isn’t there?

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Steve Roser answered on 18 Jun 2010:

have you never seen the park keepers in their little jet packs hovering over the surface?

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Marieke Navin answered on 22 Jun 2010:

levitation

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