diff --git a/src/accuracy_session.py b/src/accuracy_session.py
index 27a4a76..0d9b7a4 100644
--- a/src/accuracy_session.py
+++ b/src/accuracy_session.py
@@ -252,6 +252,7 @@ class SessionRunner:
             stream.flush()
 
         index, last_index, current_block, finished = 0, None, None, 0
+        first_trial_move_pending = True
         while index < len(pending):
             row = pending[index]
             new_block = row.block != current_block
@@ -287,7 +288,11 @@ class SessionRunner:
                 log(row, "skipped")
                 index, last_index = index + 1, None
                 continue
-            if block_change and self.block_interval > 0:
+            if first_trial_move_pending:
+                self.interval_audio.play("block")
+                self._countdown(20.0, label="initial move")
+                first_trial_move_pending = False
+            elif block_change and self.block_interval > 0:
                 self.interval_audio.play("block")
                 self._countdown(self.block_interval, label="moving to next block")
             try: