What are some funny bets to make with friends?

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I bet you can't lick your elbow.<br>
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I bet you can't go an gffghsz - https://mygiftscardmallmygift.com/ entire day with out eating.<br>
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I gdfjsfh - https://mygiftscardmallmygift.com/ bet you can't jump higher than me.<br>
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I bet you can't sdgwergsd - https://mygiftscardmallmygift.com/ make a dumber bet - https://search.yahoo.com/search?p=dumber%20bet than I can.<br>
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I bet you can't start a chant in a public place.<br>
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