IN the good ol' days you could play ball on the beach and drink 'The Refreshing Cola'. Or ride mobikes and 'Taste the Thunder'. But since Coca-Cola took over the Thums Up brand in October 1993, life's never been the same. In an assertion of sorts, the brand's loyal drinker last year demanded his cola with the 'I want my Thunder' tag line. From mobiking down a rough road to quench his selective thirst with Thums Up, the old faithful bungee jumped all the way down a cliff. Wind surfing, sky-diving, snow-boarding and parasailing graphics enhanced the new, trendy cans. Sales rose by 50 per cent over the past three years.