Index: sys/kern/kern_shutdown.c
===================================================================
--- sys/kern/kern_shutdown.c	(revision 369637)
+++ sys/kern/kern_shutdown.c	(working copy)
@@ -74,6 +74,7 @@
 #include <sys/sysctl.h>
 #include <sys/sysproto.h>
 #include <sys/taskqueue.h>
+#include <sys/time.h>
 #include <sys/vnode.h>
 #include <sys/watchdog.h>
 
@@ -107,6 +108,7 @@
     &panic_reboot_wait_time, 0,
     "Seconds to wait before rebooting after a panic");
 
+
 /*
  * Note that stdarg.h and the ANSI style va_start macro is used for both
  * ANSI and traditional C compilers.
@@ -169,6 +171,10 @@
 SYSCTL_INT(_kern, OID_AUTO, suspend_blocked, CTLFLAG_RW,
 	&suspend_blocked, 0, "Block suspend due to a pending shutdown");
 
+int verbose_shutdown = 1;
+SYSCTL_INT(_kern_shutdown, OID_AUTO, verbose, CTLFLAG_RW,
+	   &verbose_shutdown, 0, "Be more verbose at shutdown/reboot");
+
 #ifdef EKCD
 FEATURE(ekcd, "Encrypted kernel crash dumps support");
 
@@ -393,6 +399,9 @@
 {
 	static int once = 0;
 
+	if (verbose_shutdown)
+		printf("System is going down.\n");
+
 	/*
 	 * Normal paths here don't hold Giant, but we can wind up here
 	 * unexpectedly with it held.  Drop it now so we don't have to
@@ -424,6 +433,8 @@
 	/* We are out of the debugger now. */
 	kdb_active = 0;
 
+	if (verbose_shutdown > 1)
+		printf("Before shutdown_pre_sync.\n");
 	/*
 	 * Do any callouts that should be done BEFORE syncing the filesystems.
 	 */
@@ -433,6 +444,8 @@
 	 * Now sync filesystems
 	 */
 	if (!cold && (howto & RB_NOSYNC) == 0 && once == 0) {
+		if (verbose_shutdown > 1)
+			printf("Before bufshutdown.\n");
 		once = 1;
 		bufshutdown(show_busybufs);
 	}
@@ -445,11 +458,25 @@
 	 * Ok, now do things that assume all filesystem activity has
 	 * been completed.
 	 */
+	if (verbose_shutdown > 1)
+		printf("Before shutdown_post_sync.\n");
+	
 	EVENTHANDLER_INVOKE(shutdown_post_sync, howto);
 
 	if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold && !dumping) 
 		doadump(TRUE);
 
+	if (verbose_shutdown > 1) {
+		printf("I've seen things you people wouldn't believe.\n");
+		printf("Attack ships on fire off the shoulder of Orion.\n");
+		printf("I watched C-beams glitter in the dark near the\n");
+		printf("Tannhäuser Gate. All those moments will be lost in\n");
+		printf("time, like tears in rain.\n");
+		DELAY(100000);
+		printf("\nTime to die.\n");
+		DELAY(100000);
+	}
+
 	/* Now that we're going to really halt the system... */
 	EVENTHANDLER_INVOKE(shutdown_final, howto);
 
--- sys/sys/systm.h.orig	2021-04-20 16:30:43.091477000 +0200
+++ sys/sys/systm.h	2021-04-21 09:44:49.845732000 +0200
@@ -60,6 +60,7 @@
 extern char compiler_version[];	/* compiler version */
 extern char copyright[];	/* system copyright */
 extern int kstack_pages;	/* number of kernel stack pages */
+extern int verbose_shutdown;    /* Be more verbose at shutdown */
 
 extern u_long pagesizes[];	/* supported page sizes */
 extern long physmem;		/* physical memory */