A321 - vibration on rotation
I recently travelled to Tenerife on an A321-211.
Both outbound and inbound the aircraft on rotation proceeded to vibrate severely prior to the main gear leaving the runway. I've never experienced this before on this type of a/c (I've flown on the actual plane twice before). Can anybody explain the likely cause of the vibration (it was shaking the whole plane including the overhead lockers).
MTIA.