hmm.... i do practise these kind of things
just comes naturally, or maybe im a aquarius
Once i was dinin with a group of people, then this girl, close
friend, and i quite like her, sat opposite me, we shared ice cream.
It's a long table, with seats 1-1 facin each other.
Then suddenly she burped (i forgot whats it, or she dropped her
utensils and makin a super loud sound or make the table messy,
somethin which is embarassin that is) , then everyone (friends) was
lookin to our direction.. with expressions like, askin for an
explanantion to whats it.
So to save her from embarassement, i said it was me.... then re-do
what she had done (forgot whats that) to make it more believable
for them, and i laughed it off and continued my meal.
But somehow, they know it wasnt me, i dont know why,
then they said 'dont bluff' then laugh
Then
they said well done tho or somethin like that 
hmm.. thats one case