diff --git a/examples/block-sample/main.go b/examples/block-sample/main.go
index d47e6e0..6a202e4 100644
--- a/examples/block-sample/main.go
+++ b/examples/block-sample/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"runtime"
@@ -18,6 +19,10 @@ func main() {
 }
 
 func run() error {
+	labels := pprof.Labels("test_label", "test_value")
+	ctx := pprof.WithLabels(context.Background(), labels)
+	pprof.SetGoroutineLabels(ctx)
+
 	runtime.SetBlockProfileRate(int((40 * time.Microsecond).Nanoseconds()))
 	done := make(chan struct{})
 	g := errgroup.Group{}
diff --git a/heap.md b/heap.md
index e02a1ad..6bbf70c 100644
--- a/heap.md
+++ b/heap.md
@@ -2,6 +2,10 @@
 
 Totally a work in progress ... !!! Please come back later : ).
 
+https://twitter.com/felixge/status/1355846360562589696
+
+
+
 ## How does it work?
 
 Look at the go source code to understand how the data is captured, what role runtime.MemProfileRate plays, etc.