Usually played for laughs...
Django in A MILLION WAYS TO DIE IN THE WEST
[img]https://i.ibb.co/BfWjxhY/7-A29743-E-E185-4-B54-87-EF-32-B06153-F2-D1.jpg[/img]
John MacClane cameos in LOADED WEAPON 1
[img]https://i.ibb.co/3Wkkwv1/B7-FC8-CF9-56-A9-4555-A043-9-C342187-FFC2.jpg[/img]
Jay & Silent Bob pop up in SCREAM 3
[img]https://i.ibb.co/FHKpRq0/704-E6-DA8-29-EA-46-F1-9-AC8-5-C652-E6-B4-C16.jpg[/img]
...you guys got any more?