rough storyline

b = blob
s = me

s notices b
s prods b
no reaction
s prods b again
b expression
s goes to prod b
b attempts to bite
s reacts (pulls hand back)
s slams down fist to squish it
b roll dodges
b springs onto hand
s waves to try get it off
s goes grr
b climbs up arm to shoulder
s notices b is gone
s checks behind
s slowly checks up
b is on head
b eats s
b jumps on bench again

I think it will be around 40 seconds or so.
Not sure about sound effects and music.