John Massis, who we have covered before on this blog, performed a number of impressive feats of jaw strength. Above shows one that he performed in Milan, Italy in 1968 in front of Guinness World Record Officials: holding this Beechcraft model B 50 Twin-Bonanza airplane back with his teeth! No faking this one. Massis also pulled a 126 ton train for 3.5 meters in Stockholm, Sweden in 1978 and in 1979, held back a helicopter from taking off by way of a bit clenched in his teeth similar to what is pictured here.