Page 436 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

II. Another sentence-final particle tomo can replace sa when the latter
expresses encouragement or assertion to negate someone's challenge.

B: / ffi%bTl 295, (cf. KS(A))

[6c] is an acceptable sentence, but the use of tomo presupposes s.o.'s
insistence that life is not like a long journey, whereas the use of sa does
not presuppose it.
111. The sentence-final particle ne is fundamentally different from sa,
because the former indicates the speaker's request for confirmation or
agreement from the hearer, whereas sa indicates a male speaker's
assertion. But both can be used in a non-sentence-final position to
draw the hearer's attention to something as shown in [7]. Sa used this
way can be used by both male and female speakers in very informal
speech and sounds much more informal than ne. The excessive use of
such ne and sa in a single sentence leads to vulgarity.

(Yesterday I went to see a movie, y'know, and there was power
failure, y'know, and I had a bad time.)