The Dink Network

The sprite is brain 6, and I want to stop it animating and change the seq. Sequence 704 is like the dead slimes. When I try the following, it just freezes in mid seq but doesn't change unless I put a longish wait in (like 500) which isn't good. What's wrong? It works if I use sp_seq() instead but then I'd have to take out the other frames in that sequence and reshuffle everything, which I don't really want to do.

sp_brain(&current_sprite, 0);
sp_pseq(&current_sprite, 704);
int &temp = random(2, 1);
sp_pframe(&current_sprite, &temp);