Palmer struck twice in injury time, once from the spot, to secure the win.
He said: "Crazy game. When we scored in the 98th minute I thought let's go for it. Madness.
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"I didn't know what to do. I was running round when I scored.
"A hat-trick is a hat-trick. It was my first one, I'm really happy about it.
"I had a few penalties this season. I'm just going to continue to try to score them. If I get penalties, I'm going to try to score, I'm not going to try to miss.
"When we scored he (manager Mauricio Pochettino) said two minutes, come on. He's always trying to drive us on. We went for it and thankfully we scored.
"It's a big winner. It's a massive momentum booster. It puts everyone in a good mood. Hopefully we can kick on."