One of the last people to see Jackass star alive says Dunn drank 'at least four shots of whiskey and several beers' Thaddeus Kalinoski says Dunn 'didn't appear drunk' when he left the bar around 2am ...

And Hulk Hogan took to Twitter on Monday to share a moving tribute to his 'brother' Bam Margera, before realizing the reality star is not dead ... Jackass co-star Ryan Dunn.