I was standing in the aisle of a no.95 bus to campus this
morning....
A girl tapped my shoulder and asked me in a sarcastic tone of
voice: 'Can you remove your haversack and hold it in front of you
so that I can move in a little bit more?'
I'm like, sheesh, lady, ask me in a more polite tone of voice
lah..... 
And besides, whether I carry my backpack on my back or hold it
in front makes no difference as to how much space I take up, no? I
just end up infringing on the space of someone else who's sitting
down, that's all....
erm but fudgy... holding it infront of u makes u see where the
hoversack is... I hate it when ppl dun hold their hoversack and
they hoversack keep knocking into me when they turn left or
right...
But if she's saying abt moving in, then it makes no difference
whether the bag is infront of behind~
since the person sitting will be asking u to
move ur back away 