Why not to play poker with dialup (LC)

Heads up 5-10 NL
I limp with J5 he checks

Flop comes 5 2 6 with 2 diamonds. He checks I bet pot.

Turn is another 5 I bet $35. He calls.

River is the 3rd diamond but its the Jd. He leads out for $70...and I time out. I wasn't disconnected so my DP wasn't activated. It was just my [censored] internet connection. I leave the next hand.