Not on purpose, but with his age, i guess he has lost full controll of his body and what he's doing with his muscles (he has lost control of his facial muscles about 30 years ago). His acting skills also aren't funny on purpose. Watching films like <a href="http://www.imdb.com/title/tt0117550/" target="_blank">Santa with muscles</a> does hurt more than an hour with him in the ring would do.