I've seen a few collapses like that. One, the guy shot 299, then struggled to shoot a low 600. Another friend of mine shot 300 in practice just before league, (his first of any kind, but with many 270+ games), then opened the night with a big 150.
Never seen a 7-10 out of a full rack. Sounds very cool to me, too. Seen the regular 7-10 in warmups, though.
SH