It overheated then iv been on one it swung one way did a windmill and it swung th other way and jsut stopped compltely, wasnt moving nor spinning then wouldnt find zero. the ride that day was also closed for cool-down period.
To be fair, Colossus is alot smoother then past seasons, according to Darren Smith (employee) Colossus had alot of work over the closed season to make the ride smoother.
I cant remember half the announcements from vortex, my mind goes blank if they change them and I jsut replace them I only one I know is slammers old one.
Last time I went to Chessington & Zoo on the drop into the fountain area there was a lot of foam, it was nice it made it look more and mroe like a real bubbleworks