Cant say that I have had this one happen until now. I scheduled my first cutout of the year for aprill 11 there was 2 hives that needed removed from a church. while I was unloading my equipment the bees got active and started acting like they was going to swarm being early for swarm season I thought it was strange. Until they clustered on a branch of a near by tree. This worked out great I ended up with 2 hives out of the 1st hive I need to go back and cutout the 2nd . Just thought I would share this luck with you all. any how its the first time I have had a hive swarm during a removal.