How to pronounce 火花 in Cantonese (4 out of 6):

其實都睇中嘅火花係因為木材互相磨擦而產生嘅靜電火花
The spark you see is actually a static spark that is produced by the friction of wood.

Cantonese Sentence Breakdown

其實 kei4 sat6
actually
dou1
all
both
entirely
(used for emphasis) even
already
(not) at all
metropolis
capital
big city
the whole
elegant
refined
without exception
also
too
still
used in a sentence to add an inference or interrogative tone
睇中 tai2 zung1
fancy; liking someone or something (spoken)
koi3
indignant
generous
to sigh (with emotion)
火花 fo2 faa1
spark
hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
因為 jan1 wai6
due to
木材 muk6 coi4
timber
互相 wu6 soeng1
mutually
磨擦 mo4 caat3
friction
nang4
an alternative form for 能,to be able
產生 caan2 saang1
generate
靜電 zeng6 din6
static electricity