Actually this Labu fella is scared of the other counterpart Labi, but pretending or trying to be brave (indirectly trying to scare-away his rival Labi)..... because of jealousy deep inside his heart.

Normally, the way he challenge by provoking in such a manner, would make his rival become even more provocative manner to make his rival become more furious - thus will further instigate him to get buning-up further. His rival counterpart knows too well of his kind of character ever since....... as we used to say 'gempaq keling' to people of mamak type or its their nature (in a way) and that Labu too is a mamak of DKK clan by birth.