Jobi, a second half substitute for Bobby Zamora, enthuses:
"It was good - it was buzzing and once the fans get behind us it is a massive help and I really appreciate it.
"I find it exciting; I am still quite young and I haven't really experienced that from a home point of view.
"I have had it a few times away but it was nice to have at home."
Only a 4-0 defeat by Wigan on Sunday would mean West Ham slipping out of the playoff positions, though Wigan themselves - who will still be without the suspended Jason Roberts - if other results go their way, can still qualify by beating West Ham by a smaller margin.
The fact that the Hammers grabbed four goals without reply against Watford made a huge difference and should ensure that the last day of the season proper is not such a nervy affair as it would have been had, say, West Ham only won 1-0 at the weekend.
"We have got a very good goal difference and, barring a catastrophe at Wigan, we will be in there," says Jobi.
"It was massive enough for us to get the goals on Saturday and I hope to play my part in the last games.
"We don't want to lose on Saturday; we want to keep going on the run we are on and whoever we get in the playoffs is going to be tough - so we need to be strong and together."
Jobi's run from the half way line and parried strike that Marlon Harewood followed up late in the game completed the rout, though he could well have chosen to play Chris Cohen in rather than shoot himself.
"He told me that afterwards, actually," says Jobi.
"I was going to, but the defender didn't really get out so I just decided to have a shot myself.
"It would have been nice to grab a goal but the main thing is we scored from it."