Dude you at least need a spotter -- if that bar lands on your neck (which is very possible), you die. I don't think it's worth it.
There's been quite a few documented cases of people dying from the bench press. In those cases, they almost always involved using suicide grip (or not hooking thumb ...
For some reason this video was linked from mine. But yeah, that's maybe like 250 on a smith machine. Gotta do free-weight, or it doesn't count :) Good form though.
@franchyze922
I concur with this statement!