Sounds like your crew has it over sheeted and you gotta come to high to get the airflow attached again, then the hull pops up dramatically. Crew should ease the chute more while you two heat the boat and sail back up together. Like you guys are meeting halfway to get going again. Did you put on a spinn pole that is the right length? Which F18 was the chute made for? How tight is your luff tension when it's up? Should be a 45* to 90* turn with your fist on the luff when sheeted in. Lots of variables here and I hope others can chime in. I'll be on the road to Annapolis for the next two days.