The 'incident' had to do with the fact that passengers were herded outdoors in 90 degree heat with no shade, food, water, or even a place to sit from 8am to 1:30 pm. Ambulances were called because some passengers weren’t able to physically tolerate the deplorable conditions.
An official notice was made by RCCL regarding the issue. The passengers were offered
$100 onboard credit for interior/ocean view cabins, $125 onboard credit for balcony cabins, $200 onboard credit for suites, plus $25 onboard credit for any 3rd or 4th guest booked.