Rotorua

This audience was waiting for a geyser

to start erupting.

What I hadn't realised was that this particular geyser

could be induced to start by putting 300 grams

of washing powder down its throat.

The advantage of this was that it could be advertised as

coming to life at 10.30 every morning.

Actually, the guide gave a very good description

of how the washing powder worked.

It had to do with surface tension.