Underfull faces a huge river bet

[flawless_victory]

ppl are going to say this is an instacall,but thaqts not true. its almost 100% gauranteed this guy is hoping for a call... ive never seen someone remotely sane play a hand like this and be bluffing. the quetion does he have trips or is he full? he could also have AA/maybeKK. id prob go ahead and pay this off here, but im not loving it and i def would not call fast.