In response to a spider swarm a pc used his tower shield to fall onto the swarm in order to smash them (under his weight). I ruled this as effective for 1d6 of damage.
The pc was automatically damaged by the swarm as a result of the move.
After reading through the swarm rules my sense was this type of attack is not technically effective but I ruled based upon creativity and for the player's willingness to have his character take damage as a result as well. Also, to keep momentum going.
I've recently come out of "retirement" as a GM to run one of the APs and each session has been a true test of my knowledge and application of the rules.
I'm trying to get a sense of my judgment in comparison to others who've experience this type of scenario? Thanks!