JackTwo
The card you need on the river after you went all in with a jack-two offsuit, thinking you were going to win, but the other guy actually had a decent hand, and you need two pair to even have a chance of not getting absolutely destroyed.
I went all-in with a jack-two offsuit. He had a full house. I needed a two and a three to not get my ass handed to me.
I bet everything with a jack-two offsuit. He had a straight. I needed a two and a three to not look like a total idiot.
I called his all-in with a jack-two offsuit. He had a pair of queens. I needed a two and a three to not get completely roasted.