Tip 130: Wear your spare helmet.

It's the shape of the bowl your mum used to make pavlova in.
It features a colourway dominated by the purple dye they were so desperate to exhuast global supplies of in the 90s.
It is made of polystyrene which is visible, perhaps through a stretchy cover.
It does not do up properly, and oscillates from protecting your eyebrows to covering the nape of your neck.

BONUS TIP: Don it if you would like to run into the last two people who thought you were cool, and disabuse them of that notion once and forever.