Dear Boy.....if one is very, very, very petite....perhaps one could approach a 90 degree banked turn but I am sure it would never be a level turn (measured within the airmass it is operating) but could do so if it were in a thermal or rising column of air...heck...it could even climb with the right amount of Umph!
Just to clear this up, I don't actually
think that 'chutes are fully aerobatic or self-powered!